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 801st msbranicky 536 151 166ms 2 Jan 2024 802nd CatsAreFluffy 536 159 65ms 31 Jan 2024 803rd msbranicky 535 117 139ms 2 Jan 2024 804th blaztoma 🇱🇹 534 78 49ms 4 Nov 2025 805th dokutan 534 104 847ms 29 Oct 2024 806th madex 🇩🇪 533 105 11ms 21 May 2024 807th MeWhenI 🇻🇦 532 84 2ms 1 Dec 2023 808th KatieLG 🇬🇧 530 109 57ms 5 Oct 2025 809th janbehrens 🇩🇪 530 138 400ms 17 Apr 2025 810th Yewzir 🇧🇪 529 150 3ms 29 Mar 2024 811th HumanoidCPU 529 153 92ms 16 Nov 2025 812th YAJUE114514 527 138 146ms 23 Jul 2025 813th anarconic 526 125 2ms 11 Dec 2023 814th Yewzir 🇧🇪 525 117 88ms 5 Feb 2024 815th msbranicky 522 152 3ms 2 Jan 2024 816th snoozingnewt 🇨🇦 521 121 1,676ms 15 Oct 2025 817th steffan-polygolf 521 133 11ms 29 Feb 2024 818th neihousaigaai 519 108 12ms 11 Feb 2024 819th dokutan 517 121 119ms 29 Oct 2024 820th JDiLenarda 🇫🇷 517 122 1,326ms 13 Sep 2024 821st snoozingnewt 🇨🇦 516 125 2ms 15 Oct 2025 822nd aksyristos 515 81 34ms 30 Nov 2024 823rd Bodo171 514 109 10ms 1 Jul 2024 823rd trist224 🇫🇷 514 109 13ms 3 Aug 2025 825th JunkIce 513 104 370ms 3 Dec 2024 826th Kokusui 🇯🇵 513 108 5ms 26 Jul 2024 827th KatieLG 🇬🇧 510 109 1,050ms 2 Jan 2024 828th rollershutter 509 110 11ms 20 Dec 2023 828th fourth-bit 509 110 21ms 1 Jul 2024 828th jipsong 🇩🇪 509 110 20ms 5 Jul 2025 831st snoozingnewt 🇨🇦 509 136 9ms 15 Oct 2025 832nd dokutan 509 156 3ms 26 Oct 2024 833rd snoozingnewt 🇨🇦 508 143 3,668ms 15 Oct 2025 834th msbranicky 507 116 112ms 1 Jan 2024 835th typeswitch-dev 🇵🇹 507 151 5ms 25 Jun 2024 836th alphafalfa 506 107 2ms 26 Aug 2024 837th dokutan 505 100 7ms 28 Oct 2024 838th minhtrancccp 505 111 10ms 1 Dec 2023 838th croc54 505 111 20ms 30 Dec 2024 838th Mikey-Beep 🇬🇧 505 111 21ms 24 Jul 2025 838th CommandLeo 🇮🇹 505 111 21ms 1 Nov 2025 842nd MeWhenI 🇻🇦 505 132 90ms 1 Dec 2023 843rd snoozingnewt 🇨🇦 502 133 86ms 15 Oct 2025 844th msbranicky 501 111 976ms 2 Jan 2024 845th KatieLG 🇬🇧 501 170 5ms 3 Dec 2023 846th knutae 🇳🇴 500 112 21ms 16 Dec 2023 847th scpchicken 🇵🇼 497 90 3ms 13 Dec 2023 848th janbehrens 🇩🇪 496 97 602ms 9 Jan 2024 849th mathisfun271 496 113 19ms 23 Dec 2023 850th msbranicky 496 142 17ms 6 Jan 2024 851st Yewzir 🇧🇪 494 112 7ms 5 Feb 2024 852nd dokutan 492 163 117ms 6 Nov 2024 853rd snoozingnewt 🇨🇦 491 116 694ms 15 Oct 2025 854th dokutan 488 111 2ms 28 Apr 2025 855th anarconic 487 115 10ms 11 Dec 2023 855th moustave 487 115 20ms 19 Nov 2024 855th damoose717 487 115 20ms 23 May 2025 858th HumanEquivalentUnit 487 133 14ms 5 Dec 2023 859th Protothor 485 119 10ms 20 Jul 2025 860th snoozingnewt 🇨🇦 484 112 2ms 15 Oct 2025 861st NanduBC 483 116 11ms 6 Sep 2024 862nd msbranicky 483 130 2ms 2 Jan 2024 863rd msbranicky 482 134 2ms 2 Jan 2024 864th Yewzir 🇧🇪 481 100 238ms 26 Feb 2024 865th tomh1012 481 152 418ms 12 Nov 2025 866th madeforlosers 479 113 2ms 8 Dec 2023 867th dokutan 478 140 40ms 29 Oct 2024 868th snoozingnewt 🇨🇦 475 167 3ms 15 Oct 2025 869th MaxCastella 🇫🇷 473 89 780ms 1 Dec 2023 870th dokutan 473 149 19ms 24 days ago 871st RockOfStone 470 140 4ms 23 Mar 2024 872nd msbranicky 469 118 5ms 2 Jan 2024 872nd dokutan 469 118 8ms 10 Apr 2025 874th trinityy-7 469 123 22ms 6 Dec 2023 875th Feniske 🇫🇷 468 90 272ms 1 Dec 2023 876th emgordon154 467 62 3ms 1 Oct 2025 877th dokutan 467 135 1,299ms 31 Mar 2025 878th dokutan 466 126 110ms 26 Oct 2024 879th HumanoidCPU 466 132 95ms 5 Jun 2024 880th msbranicky 465 144 40ms 2 Jan 2024 First Prev 801–880 of 1,472 Next Last