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 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 558th Andrey2001 479 169 18ms 30 hours ago 562nd MeWhenI 🇻🇦 478 148 140ms 25 Oct 2024 563rd MeWhenI 🇻🇦 478 265 15ms 26 Aug 2023 564th commandblockguy 🇺🇸 477 159 467ms 1 Sep 2025 564th TheZwierzLF 🇵🇱 477 159 606ms 25 days ago 566th Alex-x90 🇺🇸 476 170 18ms 15 Dec 2023 566th TheZwierzLF 🇵🇱 476 170 18ms 22 May 2025 568th Lv0Sys 🇵🇱 476 174 10ms 11 days ago 569th stefangimmillaro 473 110 36ms 12 May 2025 570th SniperSmiley 🇺🇸 471 172 17ms 29 Jun 2022 570th adoxography 471 172 18ms 8 Aug 2022 572nd MeWhenI 🇻🇦 471 301 1,316ms 25 May 2022 573rd neihousaigaai 468 173 12ms 17 May 2022 574th acollett89 468 177 10ms 4 Aug 2025 575th dokutan 466 168 556ms 7 Apr 2024 576th Bonjour27891 🇻🇳 465 174 17ms 5 Jul 2022 577th KatieLG 🇬🇧 464 112 51ms 2 Oct 2025 578th croc54 462 175 17ms 8 Jan 2025 579th MichalMarsalek 🇨🇿 460 176 10ms 20 May 2022 580th GolfingSuccess 🇬🇷 458 241 71ms 19 Sep 2023 581st fgrosshans 🇫🇷 457 177 10ms 3 Nov 2022 582nd Natanaelel 🇸🇪 456 114 41ms 17 Jul 2023 583rd MaxElf999 455 178 18ms 27 Sep 2022 583rd za3k 455 178 10ms 14 Dec 2022 585th MeWhenI 🇻🇦 453 253 588ms 11 May 2022 586th BambooleanLogic 🇸🇪 452 183 10ms 15 Nov 2022 587th MeWhenI 🇻🇦 451 567 15ms 15 Nov 2023 588th Eilonlif 🇮🇱 447 181 10ms 15 Feb 2024 589th mbittner20 445 182 11ms 27 May 2023 589th rollershutter 445 182 10ms 4 Jul 2024 591st frankgraziano 443 143 16ms 7 Mar 2025 592nd sleepyStick 440 184 16ms 15 Jul 2022 593rd jerrandolph 438 269 263ms 1 Oct 2025 594th SirFireball3521 437 185 17ms 6 Mar 2023 594th CutSandstone 437 185 16ms 4 Jul 2024 596th nullie 435 186 17ms 8 Jun 2022 597th scpchicken 🇵🇼 433 187 16ms 4 Feb 2023 598th martinnorling 🇸🇪 430 188 16ms 10 May 2022 598th bac0id 430 188 16ms 5 Jul 2024 600th 0dyse 430 250 2ms 12 May 2025 601st AstroOrbis 428 189 18ms 12 Jul 2025 602nd roguh 🇬🇹 428 246 2ms 18 Oct 2024 603rd Lv0Sys 🇵🇱 426 122 56ms 11 days ago 604th hiichbindermax 426 190 18ms 8 Feb 2023 605th MeWhenI 🇻🇦 425 207 14ms 1 Oct 2022 606th aksyristos 425 291 2,886ms 12 Mar 2023 607th jhpaques 🇫🇷 424 191 17ms 26 Jul 2022 607th hellwue 424 191 16ms 8 Feb 2023 609th madeforlosers 422 192 18ms 13 Nov 2025 610th 0dyse 422 293 104ms 12 May 2025 611th pschmid0 🇺🇸 420 225 4ms 29 Sep 2022 612th JRaspass 🇬🇧 419 157 3ms 8 May 2022 613th msbranicky 419 193 17ms 10 Aug 2023 614th Pena86 415 195 18ms 14 Sep 2022 615th guilhem-roy 🇫🇷 415 259 2ms 9 May 2022 616th voytxt 🇨🇿 411 197 17ms 1 Mar 2023 617th 0dyse 405 200 16ms 13 Sep 2025 618th KatieLG 🇬🇧 405 313 10ms 17 Apr 2024 619th msbranicky 402 293 4,097ms 11 Jan 2025 620th blaztoma 🇱🇹 400 130 41ms 11 Oct 2025 621st scpchicken 🇵🇼 400 136 167ms 8 May 2022 622nd adamnielson42 🇺🇸 395 205 10ms 14 Apr 2023 623rd aDwarfNamedUrist 395 266 2ms 30 Oct 2023 624th alexeldridge 393 206 16ms 8 Aug 2024 625th msbranicky 391 194 566ms 17 Jan 2024 626th eiburns 391 207 16ms 26 Oct 2023 627th yuchuehw 389 208 17ms 25 Feb 2024 628th shinh 385 135 38ms 25 Jun 2022 628th emgordon154 385 135 47ms 12 Sep 2024 630th adamnielson42 🇺🇸 385 215 10ms 26 Apr 2023 631st MeWhenI 🇻🇦 384 122 3ms 11 May 2022 632nd msbranicky 378 207 270ms 20 Jan 2024 633rd Haksell 🇦🇶 374 139 36ms 23 Feb 2023 634th Natanaelel 🇸🇪 370 147 212ms 13 Nov 2022 635th adoxography 369 141 36ms 2 Mar 2024 636th dillon-duncando 368 220 11ms 3 Oct 2022 637th 4hg 🇺🇸 366 130 33ms 28 Jul 2023 638th HumanoidCPU 366 142 54ms 7 Aug 2024 639th madex 🇩🇪 366 294 2ms 8 May 2024 640th Babafaba 363 209 537ms 30 Oct 2025 First Prev 561–640 of 699 Next Last
