The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Jacobi Symbol in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 321st YAJUE114514 698 179 161ms 15 Aug 2025 322nd MeWhenI 🇻🇦 697 141 737ms 24 May 2024 323rd Shanethegamer 🇺🇸 697 156 2ms 12 May 2022 324th nstearns96 🇬🇧 694 160 10ms 15 Dec 2022 324th ahmetdemirag 🇨🇾 694 160 16ms 6 Mar 2025 324th FlorianCassayre 🇫🇷 694 160 11ms 5 Aug 2025 324th FortuiteMan 🇫🇷 694 160 11ms 4 hours ago 328th Shanethegamer 🇺🇸 693 190 366ms 20 May 2022 329th Shanethegamer 🇺🇸 692 142 632ms 16 Jan 2024 330th Waffle3z 691 153 2ms 29 Nov 2023 331st emgordon154 691 171 3,937ms 8 Nov 2024 332nd rak1507 🇬🇧 690 161 16ms 8 Feb 2023 332nd StefanHabel 🇨🇦 690 161 17ms 26 Mar 2023 332nd plcc0 690 161 9ms 4 May 2025 332nd keelimeguy 🇺🇸 690 161 29ms 14 Jun 2025 336th GrayJoKing 🇦🇺 689 173 39ms 29 Apr 2024 337th Shanethegamer 🇺🇸 689 182 355ms 26 Mar 2024 338th emplv 🇱🇻 688 138 4ms 1 Dec 2023 339th Vinterion 688 158 2ms 17 Jun 2024 340th lukegustafson 🇺🇸 687 121 10ms 25 Jun 2024 341st stefangimmillaro 685 110 36ms 12 May 2025 342nd CLOStrophobic 🇮🇹 685 162 16ms 23 Jan 2025 342nd andrewjc2000 685 162 16ms 18 Aug 2025 344th stefangimmillaro 685 183 325ms 15 Jul 2023 345th MeWhenI 🇻🇦 682 169 150ms 23 Jun 2024 345th Shanethegamer 🇺🇸 682 169 114ms 24 May 2025 347th neel11235813 681 163 17ms 24 Jan 2023 348th m-tkach 🇺🇦 681 187 16ms 15 Jan 2025 349th Irratix 🇳🇱 680 209 402ms 12 May 2022 350th lynn 680 263 34ms 23 Jul 2023 351st SirBogman 🇺🇸 679 111 36ms 14 May 2022 352nd MeWhenI 🇻🇦 678 158 104ms 23 Jun 2024 353rd CaedenHarper 🇨🇦 677 145 464ms 6 Nov 2025 354th MeWhenI 🇻🇦 676 123 9ms 25 Nov 2022 355th snoozingnewt 🇨🇦 676 148 109ms 25 days ago 356th DialFrost 🇸🇬 675 161 2ms 12 Feb 2024 357th lynn 674 120 1,293ms 3 Jun 2022 358th CaedenHarper 🇨🇦 674 211 442ms 6 Nov 2025 359th RYNO8 673 165 17ms 16 Aug 2022 359th inverseLorentz 🇦🇺 673 165 12ms 24 Mar 2024 359th fkantelberg 673 165 11ms 24 Jul 2025 362nd SirBogman 🇺🇸 672 93 2ms 30 Oct 2022 362nd retrohun 672 93 2ms 9 Nov 2022 364th uttumuttu 🇫🇮 670 124 10ms 24 May 2022 364th tayloia 🇬🇧 670 124 9ms 11 May 2023 366th inventshah 670 129 300ms 6 Nov 2022 367th MeWhenI 🇻🇦 670 149 754ms 15 Sep 2025 368th BREMAUCY 🇫🇷 669 166 16ms 30 May 2023 368th luuumine 🇫🇷 669 166 18ms 24 days ago 370th CLOStrophobic 🇮🇹 668 236 11ms 7 Mar 2025 371st sean-niemann 🇺🇸 665 94 2ms 14 Aug 2023 372nd RDShah 665 167 12ms 22 May 2022 372nd jakobkordez 🇸🇮 665 167 30ms 8 Nov 2022 372nd bob-th 665 167 16ms 24 Jan 2023 372nd Yewzir 🇧🇪 665 167 18ms 3 Jun 2024 376th janbehrens 🇩🇪 664 189 355ms 3 Jul 2023 377th Alex-x90 🇺🇸 663 187 387ms 11 May 2024 378th Natanaelel 🇸🇪 661 114 41ms 17 Jul 2023 379th commandblockguy 🇺🇸 661 168 16ms 18 Sep 2022 379th aksyristos 661 168 16ms 25 Jan 2023 379th snoozingnewt 🇨🇦 661 168 17ms 1 Oct 2025 382nd Yax42 🇫🇷 660 190 433ms 30 Jul 2025 383rd MeWhenI 🇻🇦 660 239 7ms 23 Jun 2024 384th MeWhenI 🇻🇦 660 271 32ms 23 Jun 2024 385th roavin 659 165 2ms 26 May 2022 386th Shanethegamer 🇺🇸 658 185 548ms 7 Jun 2022 387th elgan65536 658 238 226ms 9 Mar 2024 388th stefangimmillaro 657 163 99ms 15 Jul 2023 389th jtaxen 657 169 17ms 1 Apr 2024 389th JunkIce 657 169 18ms 25 Nov 2024 389th Flekay 🇩🇪 657 169 16ms 10 Jul 2025 389th Lv0Sys 🇵🇱 657 169 10ms 11 days ago 389th Andrey2001 657 169 18ms 25 hours ago 394th Shanethegamer 🇺🇸 657 190 147ms 12 May 2022 395th GolfingSuccess 🇬🇷 656 61 48ms 14 Aug 2022 396th MeWhenI 🇻🇦 656 189 497ms 23 Jun 2024 397th janlelis 655 115 34ms 19 Sep 2024 398th HumanoidCPU 655 150 454ms 31 Oct 2024 399th CatsAreFluffy 655 166 2ms 25 Jan 2023 399th Alex-x90 🇺🇸 655 166 2ms 14 Dec 2023 First Prev 321–400 of 705 Next Last