The Calendar hole will go live in approximately 2 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 639th sacredeux 667 84 11ms 20 Aug 2024 639th hiichbindermax 667 84 11ms 27 May 2025 643rd Ripick 665 94 120ms 24 Jun 2024 644th HumanoidCPU 665 114 428ms 8 Nov 2025 645th NickTheEASDude 🇺🇸 664 87 10ms 25 Apr 2024 646th BREMAUCY 🇫🇷 663 106 83ms 4 Dec 2023 647th Creative0708 🇨🇦 662 121 122ms 16 Dec 2023 647th mousetail 🇳🇱 662 121 128ms 24 Mar 2024 649th AlephSquirrel 659 81 418ms 16 Jan 2024 650th KrausRaus 🇺🇸 659 85 10ms 1 Dec 2023 650th jeff-at-tamer-dot-codes 🇺🇸 659 85 21ms 19 Dec 2023 652nd MichalMarsalek 🇨🇿 658 95 140ms 1 Dec 2023 653rd luuumine 🇫🇷 658 98 2ms 19 Nov 2025 654th tobeannouncd 656 111 128ms 11 Jan 2024 655th MeWhenI 🇻🇦 654 191 9ms 1 Dec 2023 656th KatieLG 🇬🇧 651 82 378ms 28 Oct 2024 657th Just4FunCoder 651 86 21ms 26 Feb 2024 657th SB-945 651 86 23ms 7 Apr 2024 657th Babafaba 651 86 19ms 22 Oct 2025 660th MeWhenI 🇻🇦 650 84 5ms 16 Aug 2024 661st SirFireball3521 648 62 150ms 13 Sep 2024 662nd dokutan 648 149 319ms 10 Dec 2024 663rd jatloe 644 87 22ms 24 Aug 2024 664th alomiF 644 113 152ms 6 Dec 2023 665th m42km 643 83 413ms 1 Feb 2024 666th snoozingnewt 🇨🇦 643 150 270ms 15 Oct 2025 667th jbt 641 90 10ms 24 Dec 2023 667th thisishowmymindworks 🇳🇴 641 90 10ms 28 Jun 2024 669th Yewzir 🇧🇪 639 92 137ms 27 Mar 2024 670th elgan65536 639 101 2ms 5 Dec 2023 670th madex 🇩🇪 639 101 2ms 13 Feb 2024 670th Herbert00709 🇵🇱 639 101 2ms 3 Sep 2024 673rd snoozingnewt 🇨🇦 639 110 84ms 15 Oct 2025 674th FlorianCassayre 🇫🇷 637 88 20ms 18 May 2024 674th jacekwladzinski 637 88 10ms 3 Oct 2025 676th gifti258 637 99 69ms 8 Aug 2025 677th janbehrens 🇩🇪 634 91 9ms 1 Dec 2023 677th eranws 634 91 10ms 16 Mar 2024 677th HumanoidCPU 634 91 9ms 16 Nov 2025 680th northsuperman 633 102 2ms 24 Mar 2024 681st dokutan 633 104 2ms 26 Oct 2024 682nd Yewzir 🇧🇪 633 111 83ms 5 Feb 2024 682nd HumanoidCPU 633 111 83ms 5 Jun 2024 684th lifthrasiir 🇰🇷 629 46 3ms 5 Dec 2024 685th IISResetMe 629 67 804ms 4 Dec 2023 686th snoozingnewt 🇨🇦 624 109 109ms 29 Nov 2025 687th HumanoidCPU 622 67 38ms 5 Jun 2024 688th commandblockguy 🇺🇸 622 90 11ms 1 Dec 2023 688th ZakkkkAttackkkk 🇵🇭 622 90 11ms 9 May 2024 688th HumanoidCPU 622 90 20ms 5 Jun 2024 688th Bmrl7 622 90 12ms 4 days ago 692nd two-bad 🇬🇧 621 93 9ms 5 Feb 2024 692nd helbling 🇨🇭 621 93 10ms 16 Jun 2024 692nd snoozingnewt 🇨🇦 621 93 11ms 15 Oct 2025 695th SirBogman 🇺🇸 620 68 244ms 18 May 2024 696th Babafaba 620 86 399ms 22 Oct 2025 697th iczelia 🇩🇪 620 104 2ms 10 Oct 2025 698th Daniel-Ellison 617 78 661ms 8 Aug 2025 699th msbranicky 617 154 25ms 3 Jan 2024 700th agreegious 616 91 10ms 17 Nov 2024 701st MeWhenI 🇻🇦 616 105 13ms 1 Dec 2023 702nd Steffan153 🇫🇮 616 123 390ms 5 Dec 2023 702nd Lydxn 🇨🇦 616 123 377ms 16 Dec 2023 704th Andrey-Plotnikov 614 94 10ms 13 Jan 2025 705th bac0id 614 139 438ms 10 Jan 2025 706th Shanethegamer 🇺🇸 613 68 43ms 1 Dec 2023 707th Maximizer02 613 113 13ms 7 Nov 2024 708th dokutan 613 155 25ms 20 Apr 2025 709th dokutan 609 86 125ms 29 Oct 2024 710th FortuiteMan 🇫🇷 608 96 12ms 10 days ago 711th uttumuttu 🇫🇮 608 101 90ms 21 Dec 2023 712th dokutan 606 94 776ms 23 Sep 2025 713th msbranicky 606 116 81ms 2 Jan 2024 714th h3ra993huskp 🇯🇵 606 125 469ms 30 Nov 2025 715th dokutan 604 134 414ms 27 Sep 2025 716th annaproxy 603 107 2ms 20 Dec 2023 717th msbranicky 603 235 1,619ms 16 Sep 2025 718th dcgjb 602 70 1,013ms 25 Mar 2024 719th ahmetdemirag 🇨🇾 602 93 11ms 9 Jun 2024 720th dokutan 602 113 96ms 31 Oct 2024 First Prev 641–720 of 1,474 Next Last