The Calendar hole will go live in approximately 13 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 481st tayloia 🇬🇧 791 73 9ms 3 Dec 2023 482nd albanian-laundromat 791 86 108ms 11 Nov 2025 483rd annaproxy 791 92 128ms 11 Dec 2023 484th wuduculfre 789 71 10ms 22 Jul 2025 485th edsrzf 🇳🇿 788 80 65ms 28 Jul 2025 486th MeWhenI 🇻🇦 787 53 40ms 1 Dec 2023 486th olleicua 🇺🇸 787 53 57ms 23 Dec 2023 488th emgordon154 787 88 12ms 10 Dec 2024 489th Shanethegamer 🇺🇸 785 68 379ms 18 Jan 2024 490th Shanethegamer 🇺🇸 785 69 2ms 1 Dec 2023 491st targrik 785 123 270ms 30 Jun 2025 492nd DialFrost 🇸🇬 785 159 8ms 23 May 2025 493rd tailorspy 783 109 76ms 12 Aug 2024 494th ovs-code 🇩🇪 779 89 10ms 12 Dec 2023 495th programjames 778 72 11ms 24 Dec 2023 495th keelimeguy 🇺🇸 778 72 11ms 14 Jun 2025 497th elgan65536 778 103 123ms 29 Mar 2024 498th Natanaelel 🇸🇪 777 47 38ms 26 Jan 2024 499th pardouin 🇫🇷 776 92 10ms 25 Apr 2025 500th drabart 🇵🇱 775 110 75ms 2 Dec 2023 500th AdrienHache 🇫🇷 775 110 127ms 7 Jan 2024 502nd albanian-laundromat 774 146 444ms 13 Oct 2025 503rd SirBogman 🇺🇸 773 69 397ms 15 Jan 2024 503rd CaedenHarper 🇨🇦 773 69 439ms 30 Jul 2025 505th DialFrost 🇸🇬 772 54 51ms 1 Dec 2023 505th neel11235813 772 54 46ms 1 Dec 2023 505th error256 772 54 35ms 14 Feb 2025 508th MeWhenI 🇻🇦 770 68 130ms 3 Aug 2024 509th Shanethegamer 🇺🇸 769 72 6ms 1 Dec 2023 510th MeWhenI 🇻🇦 768 80 89ms 1 Dec 2023 511th xsot 🇸🇬 768 93 10ms 5 Oct 2024 511th DialFrost 🇸🇬 768 93 10ms 6 Dec 2024 511th MeWhenI 🇻🇦 768 93 10ms 14 Feb 2025 514th MeWhenI 🇻🇦 765 66 6ms 1 Dec 2023 515th Shanethegamer 🇺🇸 764 63 258ms 25 Sep 2024 516th MeWhenI 🇻🇦 763 71 2ms 1 Dec 2023 517th MeWhenI 🇻🇦 763 105 122ms 14 Feb 2025 518th Shanethegamer 🇺🇸 761 73 965ms 1 Dec 2023 519th pardouin 🇫🇷 761 91 9ms 26 Apr 2025 520th CaedenHarper 🇨🇦 759 75 753ms 27 Sep 2025 521st Yewzir 🇧🇪 759 83 38ms 26 May 2024 522nd SirBogman 🇺🇸 758 53 146ms 4 Dec 2023 523rd KatieLG 🇬🇧 758 55 37ms 2 Jan 2024 523rd TFeld00 🇩🇰 758 55 46ms 3 Sep 2024 525th NickTheEASDude 🇺🇸 757 87 2ms 25 Apr 2024 526th MateuszPietrzak 🇵🇱 755 113 75ms 2 Dec 2023 527th weliveinhell 🇭🇹 750 77 10ms 2 Dec 2023 527th Maznek 750 77 9ms 9 Dec 2023 527th niklv 🇷🇺 750 77 9ms 27 Dec 2023 527th targrik 750 77 10ms 16 Sep 2025 527th madeforlosers 750 77 9ms 20 Oct 2025 532nd albanian-laundromat 748 127 34ms 15 days ago 533rd firegene 🇮🇪 747 75 11ms 3 Dec 2023 534th annaproxy 746 98 365ms 12 Dec 2023 535th Shanethegamer 🇺🇸 745 93 14ms 19 Dec 2023 536th MeWhenI 🇻🇦 742 31 59ms 1 Dec 2023 537th snyderek 🇺🇸 742 115 62ms 18 Dec 2024 538th Yewzir 🇧🇪 741 98 10ms 9 Jan 2025 539th albanian-laundromat 740 77 810ms 24 Sep 2025 540th voytxt 🇨🇿 740 78 10ms 1 Dec 2023 540th dmrichwa 🇺🇸 740 78 10ms 2 Dec 2023 540th dylanarmstrong 740 78 10ms 9 Dec 2023 540th Irratix 🇳🇱 740 78 10ms 29 Apr 2024 540th Yax42 🇫🇷 740 78 9ms 13 Nov 2025 545th snoozingnewt 🇨🇦 740 83 94ms 18 days ago 546th DialFrost 🇸🇬 737 94 9ms 15 Dec 2024 547th AdrienHache 🇫🇷 733 88 4ms 7 Jan 2024 548th frankgraziano 732 69 9ms 26 Feb 2025 549th SirBogman 🇺🇸 731 57 45ms 4 Dec 2023 549th anter69 🇭🇺 731 57 39ms 13 Feb 2024 549th edsrzf 🇳🇿 731 57 36ms 6 Mar 2025 552nd KrausRaus 🇺🇸 731 79 10ms 1 Dec 2023 552nd jared-hughes 731 79 10ms 17 Dec 2023 552nd uttumuttu 🇫🇮 731 79 10ms 21 Dec 2023 555th nwellnhof 🇩🇪 727 77 19ms 12 Jan 2024 555th dokutan 727 77 11ms 29 Oct 2024 557th weliveinhell 🇭🇹 726 133 251ms 2 Dec 2023 558th Herbert00709 🇵🇱 723 118 78ms 27 Nov 2024 559th FlyingPenguin223 721 87 2ms 4 Dec 2023 560th tatzyr 🇯🇵 719 58 45ms 29 Dec 2024 First Prev 481–560 of 1,473 Next Last