The Calendar hole will go live in approximately 7 days. Why not try and solve it ahead of time?
Farey Sequence 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 881st AsbestosSniffer 464 184 1,003ms 1 Dec 2023 882nd cmkb3 463 91 263ms 1 Dec 2023 883rd msbranicky 463 117 2ms 6 Jan 2024 884th TinyTheBrontosaurus 463 121 19ms 3 Dec 2023 884th RobertHoeh 463 121 11ms 9 Dec 2023 884th klixel 🇨🇦 463 121 10ms 21 Jun 2025 887th snoozingnewt 🇨🇦 462 145 38ms 15 Oct 2025 888th CatsAreFluffy 461 140 4ms 31 Jan 2024 889th msbranicky 460 159 365ms 2 Jan 2024 890th Liibe 456 166 476ms 2 Oct 2025 891st Stockoh 🇫🇷 455 123 11ms 23 Apr 2024 892nd pedro-a-soares 455 127 9ms 6 Dec 2023 893rd snoozingnewt 🇨🇦 454 158 26ms 15 Oct 2025 894th snoozingnewt 🇨🇦 453 92 38ms 15 Oct 2025 895th MeWhenI 🇻🇦 452 89 117ms 1 Dec 2023 896th yuchuehw 452 124 20ms 15 May 2024 896th Flekay 🇩🇪 452 124 19ms 11 Jul 2025 898th HumanoidCPU 450 139 124ms 5 Jun 2024 899th aydamak 448 93 38ms 15 May 2024 900th estomagordo 🇳🇱 448 125 10ms 25 Mar 2025 901st Vaekor 445 126 12ms 28 Feb 2024 902nd msbranicky 445 153 123ms 2 Jan 2024 903rd Kaffeleif 444 156 13ms 13 Mar 2024 904th HumanoidCPU 441 165 3,195ms 24 Oct 2024 905th snoozingnewt 🇨🇦 439 115 7ms 15 Oct 2025 906th 4ndyJ 🇬🇧 438 128 10ms 29 Feb 2024 907th BambooleanLogic 🇸🇪 437 132 24ms 1 Dec 2023 908th sidok 434 111 465ms 26 Apr 2024 909th CutSandstone 434 129 11ms 19 Jul 2024 909th wh3n3v3r 🇨🇿 434 129 21ms 18 Nov 2024 911th janbehrens 🇩🇪 433 175 424ms 16 Dec 2023 912th dokutan 432 146 39ms 29 Oct 2024 913th addmai 431 130 19ms 30 Jul 2025 914th acollett89 431 134 23ms 5 Aug 2025 915th snoozingnewt 🇨🇦 429 129 5ms 15 Oct 2025 916th bjornmartensson 428 131 77ms 11 Dec 2023 916th Mabeloid 🇳🇴 428 131 19ms 11 Sep 2024 918th epic-programmer-guy 428 170 130ms 3 Jan 2024 919th inverseLorentz 🇦🇺 426 171 135ms 6 Apr 2024 920th michelebastione 🇮🇹 424 132 23ms 23 Dec 2023 920th CatsAreFluffy 424 132 25ms 31 Jan 2024 920th FranklinJiaChen 424 132 27ms 4 Aug 2024 923rd itserasmus 424 136 10ms 26 Jan 2024 924th snoozingnewt 🇨🇦 423 139 108ms 15 Oct 2025 925th CatsAreFluffy 423 172 160ms 17 Dec 2023 926th msbranicky 422 169 11ms 2 Jan 2024 927th solisolu 421 133 11ms 18 days ago 928th evnu 417 160 100ms 13 Oct 2025 929th XenThe 🇬🇧 415 139 10ms 14 Sep 2025 930th snoozingnewt 🇨🇦 414 151 125ms 15 Oct 2025 931st snoozingnewt 🇨🇦 414 173 40ms 15 Oct 2025 932nd msbranicky 411 117 236ms 11 Jan 2024 933rd CatsAreFluffy 410 130 502ms 31 Jan 2024 934th f-tucker 409 137 32ms 24 May 2024 934th Jaydosu 409 137 12ms 26 Jun 2024 934th mbittner20 409 137 20ms 13 Apr 2025 934th Andrey2001 409 137 19ms 20 days ago 938th olleicua 🇺🇸 409 141 24ms 20 Jan 2024 939th Mabeloid 🇳🇴 407 131 473ms 17 Sep 2024 940th unfinishedprogram 407 142 11ms 5 Dec 2023 941st msbranicky 407 186 409ms 2 Jan 2024 942nd Emutis 🇱🇹 406 138 17ms 4 Aug 2025 943rd KatieLG 🇬🇧 402 100 136ms 2 Jan 2024 944th AtengChen 400 140 12ms 14 Aug 2024 945th snoozingnewt 🇨🇦 397 163 9ms 15 Oct 2025 946th dokutan 397 188 4ms 28 Oct 2024 947th nephila-nacrea 🇬🇧 396 113 2ms 6 Feb 2024 948th gigaprofisi 🇺🇸 395 146 11ms 4 Sep 2025 949th ridingqwerty 🇺🇸 394 142 17ms 28 Dec 2023 949th CyberTapir 394 142 11ms 5 Sep 2024 949th wobblybits 394 142 21ms 20 Aug 2025 949th cthierfelder 🇲🇨 394 142 20ms 14 Nov 2025 953rd msbranicky 393 147 9ms 2 Jan 2024 954th sciencejiho 392 143 21ms 18 Oct 2024 954th Andrey135296 392 143 12ms 26 Oct 2024 956th alexsave 390 148 10ms 13 Nov 2025 957th xyangst 387 149 13ms 7 Oct 2024 958th sultan 386 145 10ms 3 Mar 2024 958th alexeldridge 386 145 18ms 12 Aug 2024 958th ComputerKWasTaken 🇺🇸 386 145 25ms 23 Apr 2025 First Prev 881–960 of 1,472 Next Last