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 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 881st tomh1012 481 152 418ms 12 Nov 2025 882nd madeforlosers 479 113 2ms 8 Dec 2023 883rd solisolu 478 133 11ms 18 days ago 884th dokutan 478 140 40ms 29 Oct 2024 885th snoozingnewt 🇨🇦 475 167 3ms 15 Oct 2025 886th MaxCastella 🇫🇷 473 89 780ms 1 Dec 2023 887th dokutan 473 149 19ms 24 days ago 888th snoozingnewt 🇨🇦 473 184 5ms 15 Oct 2025 889th CatsAreFluffy 472 130 502ms 31 Jan 2024 890th RockOfStone 470 140 4ms 23 Mar 2024 891st msbranicky 469 118 5ms 2 Jan 2024 891st dokutan 469 118 8ms 10 Apr 2025 893rd trinityy-7 469 123 22ms 6 Dec 2023 894th Mabeloid 🇳🇴 469 131 473ms 17 Sep 2024 895th Feniske 🇫🇷 468 90 293ms 1 Dec 2023 896th emgordon154 467 62 3ms 1 Oct 2025 897th dokutan 467 135 1,299ms 31 Mar 2025 898th dokutan 466 126 110ms 26 Oct 2024 899th HumanoidCPU 466 132 95ms 5 Jun 2024 900th msbranicky 465 144 40ms 2 Jan 2024 901st f-tucker 464 137 32ms 24 May 2024 901st Jaydosu 464 137 12ms 26 Jun 2024 901st mbittner20 464 137 20ms 13 Apr 2025 901st Andrey2001 464 137 19ms 19 days ago 905th AsbestosSniffer 464 184 1,003ms 1 Dec 2023 906th cmkb3 463 91 263ms 1 Dec 2023 907th msbranicky 463 117 2ms 6 Jan 2024 908th snoozingnewt 🇨🇦 462 145 38ms 15 Oct 2025 909th Emutis 🇱🇹 461 138 17ms 4 Aug 2025 910th CatsAreFluffy 461 140 4ms 31 Jan 2024 911th msbranicky 460 159 365ms 2 Jan 2024 912th Liibe 456 166 476ms 2 Oct 2025 913th pedro-a-soares 455 127 9ms 6 Dec 2023 914th AtengChen 454 140 12ms 14 Aug 2024 915th snoozingnewt 🇨🇦 454 158 26ms 15 Oct 2025 916th snoozingnewt 🇨🇦 453 92 38ms 15 Oct 2025 917th HumanoidCPU 450 139 124ms 5 Jun 2024 918th sidok 449 111 465ms 26 Apr 2024 919th aydamak 448 93 38ms 15 May 2024 920th ridingqwerty 🇺🇸 448 142 17ms 28 Dec 2023 920th CyberTapir 448 142 11ms 5 Sep 2024 920th wobblybits 448 142 21ms 20 Aug 2025 920th cthierfelder 🇲🇨 448 142 20ms 14 Nov 2025 924th msbranicky 445 153 123ms 2 Jan 2024 925th sciencejiho 444 143 21ms 18 Oct 2024 925th Andrey135296 444 143 12ms 26 Oct 2024 927th Kaffeleif 444 156 13ms 13 Mar 2024 928th KatieLG 🇬🇧 441 131 61ms 13 Jun 2024 929th HumanoidCPU 441 165 3,999ms 24 Oct 2024 930th snoozingnewt 🇨🇦 439 115 7ms 15 Oct 2025 931st sultan 438 145 10ms 3 Mar 2024 931st alexeldridge 438 145 18ms 12 Aug 2024 931st ComputerKWasTaken 🇺🇸 438 145 25ms 23 Apr 2025 934th BambooleanLogic 🇸🇪 437 132 24ms 1 Dec 2023 935th KatieLG 🇬🇧 436 100 136ms 2 Jan 2024 936th dokutan 436 124 139ms 26 Oct 2024 937th ridingqwerty 🇺🇸 435 141 475ms 25 Jan 2024 938th amollberg 🇸🇪 435 146 19ms 8 Jan 2024 939th janbehrens 🇩🇪 433 175 424ms 16 Dec 2023 940th dokutan 432 146 39ms 29 Oct 2024 941st acollett89 431 134 23ms 5 Aug 2025 942nd snoozingnewt 🇨🇦 429 129 5ms 15 Oct 2025 943rd epic-programmer-guy 428 170 130ms 3 Jan 2024 944th Alban-Boissard 427 149 47ms 14 Jun 2025 945th inverseLorentz 🇦🇺 426 171 135ms 6 Apr 2024 946th itserasmus 424 136 10ms 26 Jan 2024 947th snoozingnewt 🇨🇦 423 139 108ms 15 Oct 2025 948th CatsAreFluffy 423 172 160ms 17 Dec 2023 949th msbranicky 422 118 236ms 11 Jan 2024 950th msbranicky 422 169 11ms 2 Jan 2024 951st dokutan 421 99 39ms 29 Oct 2024 952nd 77Tigers 421 151 11ms 22 Jun 2024 953rd XenThe 🇬🇧 415 139 10ms 14 Sep 2025 954th jfallon1997 415 153 20ms 3 Jun 2024 955th snoozingnewt 🇨🇦 414 151 125ms 15 Oct 2025 956th snoozingnewt 🇨🇦 414 173 40ms 15 Oct 2025 957th olleicua 🇺🇸 409 141 24ms 20 Jan 2024 958th unfinishedprogram 407 142 11ms 5 Dec 2023 959th JunkIce 407 151 525ms 8 Jan 2025 960th AzroyAr 407 156 23ms 28 Dec 2023 First Prev 881–960 of 1,483 Next Last