The Calendar hole will go live in approximately 7 days. Why not try and solve it ahead of time?
Jacobi Symbol in all languages in chars. 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 Chars Time Submitted 560th Flekay 🇩🇪 479 169 16ms 10 Jul 2025 560th Lv0Sys 🇵🇱 479 169 10ms 17 days ago 560th Andrey2001 479 169 17ms 7 days ago 564th MeWhenI 🇻🇦 478 148 140ms 25 Oct 2024 565th MeWhenI 🇻🇦 478 265 15ms 26 Aug 2023 566th commandblockguy 🇺🇸 477 159 467ms 1 Sep 2025 566th TheZwierzLF 🇵🇱 477 159 606ms 23 Nov 2025 568th Alex-x90 🇺🇸 476 170 18ms 15 Dec 2023 568th TheZwierzLF 🇵🇱 476 170 18ms 22 May 2025 570th Lv0Sys 🇵🇱 476 174 10ms 17 days ago 571st stefangimmillaro 473 110 36ms 12 May 2025 572nd SniperSmiley 🇺🇸 471 172 17ms 29 Jun 2022 572nd adoxography 471 172 18ms 8 Aug 2022 574th MeWhenI 🇻🇦 471 301 1,316ms 25 May 2022 575th neihousaigaai 468 173 12ms 17 May 2022 576th acollett89 468 177 10ms 4 Aug 2025 577th dokutan 466 168 556ms 7 Apr 2024 578th Bonjour27891 🇻🇳 465 174 17ms 5 Jul 2022 579th KatieLG 🇬🇧 464 112 35ms 2 Oct 2025 580th croc54 462 175 17ms 8 Jan 2025 581st MichalMarsalek 🇨🇿 460 176 10ms 20 May 2022 582nd GolfingSuccess 🇬🇷 458 241 71ms 19 Sep 2023 583rd fgrosshans 🇫🇷 457 177 10ms 3 Nov 2022 584th Natanaelel 🇸🇪 456 114 35ms 17 Jul 2023 585th MaxElf999 455 178 18ms 27 Sep 2022 585th za3k 455 178 10ms 14 Dec 2022 587th MeWhenI 🇻🇦 453 253 588ms 11 May 2022 588th BambooleanLogic 🇸🇪 452 183 10ms 15 Nov 2022 589th MeWhenI 🇻🇦 451 567 15ms 15 Nov 2023 590th Eilonlif 🇮🇱 447 181 10ms 15 Feb 2024 591st mbittner20 445 182 11ms 27 May 2023 591st rollershutter 445 182 10ms 4 Jul 2024 593rd frankgraziano 443 143 12ms 7 Mar 2025 594th sleepyStick 440 184 16ms 15 Jul 2022 595th jerrandolph 438 269 263ms 1 Oct 2025 596th SirFireball3521 437 185 17ms 6 Mar 2023 596th CutSandstone 437 185 16ms 4 Jul 2024 598th nullie 435 186 17ms 8 Jun 2022 599th scpchicken 🇵🇼 433 187 16ms 4 Feb 2023 600th martinnorling 🇸🇪 430 188 16ms 10 May 2022 600th bac0id 430 188 16ms 5 Jul 2024 602nd 0dyse 430 250 2ms 12 May 2025 603rd AstroOrbis 428 189 18ms 12 Jul 2025 604th roguh 🇬🇹 428 246 2ms 18 Oct 2024 605th Lv0Sys 🇵🇱 426 122 39ms 17 days ago 606th hiichbindermax 426 190 18ms 8 Feb 2023 607th MeWhenI 🇻🇦 425 207 14ms 1 Oct 2022 608th aksyristos 425 291 2,526ms 12 Mar 2023 609th jhpaques 🇫🇷 424 191 17ms 26 Jul 2022 609th hellwue 424 191 16ms 8 Feb 2023 611th madeforlosers 422 192 18ms 13 Nov 2025 612th 0dyse 422 293 75ms 12 May 2025 613th pschmid0 🇺🇸 420 225 5ms 29 Sep 2022 614th JRaspass 🇬🇧 419 157 3ms 8 May 2022 615th msbranicky 419 193 17ms 10 Aug 2023 616th Pena86 415 195 18ms 14 Sep 2022 617th guilhem-roy 🇫🇷 415 259 2ms 9 May 2022 618th voytxt 🇨🇿 411 197 17ms 1 Mar 2023 619th 0dyse 405 200 16ms 13 Sep 2025 620th KatieLG 🇬🇧 405 313 10ms 17 Apr 2024 621st msbranicky 402 293 4,097ms 11 Jan 2025 622nd blaztoma 🇱🇹 400 130 35ms 11 Oct 2025 623rd scpchicken 🇵🇼 400 136 143ms 8 May 2022 624th adamnielson42 🇺🇸 395 205 10ms 14 Apr 2023 625th aDwarfNamedUrist 395 266 2ms 30 Oct 2023 626th alexeldridge 393 206 16ms 8 Aug 2024 627th msbranicky 391 194 566ms 17 Jan 2024 628th eiburns 391 207 16ms 26 Oct 2023 629th yuchuehw 389 208 17ms 25 Feb 2024 630th shinh 385 135 36ms 25 Jun 2022 630th emgordon154 385 135 34ms 12 Sep 2024 632nd adamnielson42 🇺🇸 385 215 10ms 26 Apr 2023 633rd MeWhenI 🇻🇦 384 122 3ms 11 May 2022 634th msbranicky 378 207 212ms 20 Jan 2024 635th Haksell 🇦🇶 374 139 34ms 23 Feb 2023 636th Natanaelel 🇸🇪 370 147 157ms 13 Nov 2022 637th adoxography 369 141 34ms 2 Mar 2024 638th dillon-duncando 368 220 11ms 3 Oct 2022 639th 4hg 🇺🇸 366 130 33ms 28 Jul 2023 640th HumanoidCPU 366 142 33ms 7 Aug 2024 First Prev 561–640 of 700 Next Last
