0x666 byte 6's only c macro

[OwOday]

Entry Info

• Date: 16/01/26
• BGGP Challenge: bggp6
• Name: OwOday
• Contact Info: @OwOday@social.seattle.wa.us
• Online Presence: ^
• Writeup Link: https://github.com/OwOday/bggp6

File Info

• Target File Type: c
• Target File Size: 0x666
• SHA256 Hash: 0d29508c38a37afda322a44814d741e2d7f0e72cf24e2d1eeb3007b12403b9dd

File Contents

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

Environment Info

Mac Apple Silicon

Target Software and Version

Apple clang version 17.0.0 (clang-1700.4.4.1)
Target: arm64-apple-darwin25.1.0

Environment Setup

its just gcc on a mac

Additional Info

The expanded form of the macro is:

(((((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))+((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))-((6)-((6)-((6)/(6))))))((6)-((6)/(6)))(6))((((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))))))+((((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))(((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))+((6)-((6)/(6))))-((6)-((6)-((6)/(6))))))((((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))))))+((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))(((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))+((6)-((6)/(6))))-((6)-((6)-((6)/(6))))))) (((((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))))((((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))))))+((((((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))+((6)-((6)/(6))))-((6)-((6)-((6)/(6)))))(6)(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))+1))) (((((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))+((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))-((6)-((6)-((6)/(6))))))((6)-((6)/(6)))(6))((((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))))))+((((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))(((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))+((6)-((6)/(6))))-((6)-((6)-((6)/(6))))))((((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))))))+(((6)((6)+((6)-((6)/(6))))))) (((((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))+((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))-((6)-((6)-((6)/(6))))))((6)-((6)/(6)))(6))((((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))))))+((((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))(((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))+((6)-((6)/(6))))-((6)-((6)-((6)/(6))))))((((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))))))+((((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))+((6)-((6)/(6))))))) (((((6)((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))+((6)-(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))))))+(((((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))+((6)-((6)/(6))))-((6)-((6)-((6)/(6)))))((6)-((6)/(6)))(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))(((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))))+(((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))))(((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))))+((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))) ((((((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))+((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))-((6)-((6)-((6)/(6))))))((6)-((6)/(6)))(6))+(((6)-(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))))(((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))))) + (((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))(((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))))) + (((6)-((6)-((6)/(6))))) ) (((((6)((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))+((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))-((6)-((6)-((6)/(6))))))((6)-((6)/(6))))+(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))((((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6))))))))))+(((((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))+((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))-((6)-((6)-((6)/(6))))))((6)-((6)/(6))))(((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))))+(((((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))-((6)-((6)-((6)/(6)))))(((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))))+(((6)+(6))*((6)+((6)+(((6)-((6)/(6)))-((6)-((6)-((6)/(6)))))))))

[netspooky]

Verified, thank you!!

https://github.com/binarygolf/BGGP/blob/main/2025/entries/OwOday/OwOday.C.md

Verification

Issue: #176

• Reviewer: BusesCanFly
• Review Date: 2026-03-14
• SHA256: 0d29508c38a37afda322a44814d741e2d7f0e72cf24e2d1eeb3007b12403b9dd
• Score: 2984 [ Base: 2728 (4096 - 1368) +256 (Writeup) ]
• Note: Verified on apple silicon (native), the score is based on the input C file, not the output binary. SHA256 of that is 1b710bc9fee1f6b072be719eb0509497b25e18c9bf034ca4a8ad809ab68c867e

Output:

❯ echo 'I2luY2x1ZGUgPHN0ZGludC5oPgojZGVmaW5lIHNpeCAoNikKI2RlZmluZSBzNiAoc2l4LShzaXgvc2l4KSkKI2RlZmluZSBzc3Nzc3M2IChzaXgtc2l4KQojZGVmaW5lIHNzc3NzNiAoc2l4LXM2KQojZGVmaW5lIHNzNiAoczYtc3Nzc3M2KQojZGVmaW5lIHNzc3M2IChzaXgtc3M2KQojZGVmaW5lIHNzczYgKHNzNi1zc3NzczYpCiNkZWZpbmUgczZ4eCAoc3M2K3NzczYpCiNkZWZpbmUgczZ4eHh4IChzczYrczYpCiNkZWZpbmUgczZ4eHggKHM2eHh4eC1zc3NzczYpCiNkZWZpbmUgc3M2NiAoc2l4K3NzNikKI2RlZmluZSBzNjZ4IChzaXgrc2l4KQojZGVmaW5lIHM2Nnh4IChzaXgrczZ4eCkKI2RlZmluZSBzNjYgKHNpeCtzNikKI2RlZmluZSBzczY2NiAoc2l4K3NzNjYpCiNkZWZpbmUgc3goeCkgI3gKI2RlZmluZSBzKHgpIHN4KHgpCiNkZWZpbmUgX19fX19fczZ4IChzczY2NipzczY2NipzczY2NipzczY2NipzczY2NipzczY2NikKI2RlZmluZSBfX19fczZ4IChzczY2NipzczY2NipzczY2NipzczY2NikKI2RlZmluZSBfX3M2eCAoc3M2NjYqc3M2NjYpCiNkZWZpbmUgc2lpeCAoKChzNnh4KnM2KnNpeCkqKF9fX19fX3M2eCkpKygoc3M2NjYqczZ4eHgpKihfX19fczZ4KSkrKHNzNipzNnh4eCkpIC8vMHhkMjgwMDAyMAojZGVmaW5lIHNpaWl4ICgoKHNzNjY2KSooX19fX19fczZ4KSkrKCgoczZ4eHgqc2l4KnNzNikrMSkpKSAvLzB4MTAwMDAwYzEKI2RlZmluZSBzaWlpaXggKCgoczZ4eCpzNipzaXgpKihfX19fX19zNngpKSsoKHNzNjY2KnM2eHh4KSooX19fX3M2eCkpKygoc2l4KnM2NikpKSAgLy8weGQyODAwMDQyCiNkZWZpbmUgc2lpaWlpeCAoKChzNnh4KnM2KnNpeCkqKF9fX19fX3M2eCkpKygoc3M2NjYqczZ4eHgpKihfX19fczZ4KSkrKChzczY2NipzNnh4eHgpKSkgLy8weGQyODAwMDkwCiNkZWZpbmUgc2lpaWlpaXggKCgoKHNpeCpzczY2KnNzNikrc3NzczYpKihfX19fX19zNngpKSsoKHM2eHh4KnM2KnNzNikqX19fX3M2eCkrKChzczYqc3M2NjYpKl9fczZ4KStzczY2NikgLy8weGYyYTA0MDEwCiNkZWZpbmUgc2lpaWlpaWl4ICgoKChzNnh4KnM2KnNpeCkrKHNzc3M2KSkqX19fX19fczZ4KSArIChzczY2NipfX3M2eCkgKyAoc3Nzc3M2KSApIC8vMHhkNDAwMTAwMQojZGVmaW5lIHNpaWlpaWlpaXggKCgoKHNpeCpzNnh4KnM2KStzczYpKihfX19fX19zNngpKSsoKChzczY2Nitzc3M2KSpzNikqX19fX3M2eCkrKHNzczYqX19zNngpKyhzNjZ4KnNzNjY2KSkvLzB4ZDY1ZjAzYzAKX19hc21fXygiLnRleHRcbi5wMmFsaWduIDJcbi5nbG9iYWwgX182XG5fXzY6XG5cdCIKICAgICAgICAiLmluc3QgIiBzKHNpaXgpICJcblx0IgogICAgICAgICIuaW5zdCAiIHMoc2lpaXgpICJcblx0IgogICAgICAgICIuaW5zdCAiIHMoc2lpaWl4KSAiXG5cdCIKICAgICAgICAiLmluc3QgIiBzKHNpaWlpaXgpICJcblx0IgogICAgICAgICIuaW5zdCAiIHMoc2lpaWlpaXgpICJcblx0IgogICAgICAgICIuaW5zdCAiIHMoc2lpaWlpaWl4KSAiXG5cdCIKICAgICAgICAiLmluc3QgIiBzKHNpaWlpaWlpaXgpICJcblx0IgogICAgICAgICIucDJhbGlnbiAyXG4xOiAuYXNjaWkgXCI2XFxuXCJcbiIpO3ZvaWQgXzYodm9pZCk7aW50IG1haW4odm9pZCl7XzYoKTtyZXR1cm4gc3Nzc3NzNjt9' | base64 -d > entry.c
❯ gcc -o entry entry.c
❯ ./entry
6