The Calendar hole will go live in approximately 8 days. Why not try and solve it ahead of time?
Kaprekar Numbers 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 799th Shanethegamer 🇺🇸 137 452 9ms 1 Nov 2024 799th madex 🇩🇪 137 452 9ms 1 Nov 2024 799th jtaxen 137 452 9ms 1 Nov 2024 799th Stockoh 🇫🇷 137 452 9ms 4 Nov 2024 799th evan18c 137 452 9ms 7 Nov 2024 799th roguh 🇬🇹 137 452 9ms 27 Nov 2024 799th mathisfun271 137 452 10ms 25 Jan 2025 799th moustave 137 452 9ms 9 Apr 2025 799th SectorCorruptor 137 452 9ms 24 Jul 2025 799th vgamula 🇺🇦 137 452 9ms 25 Jul 2025 799th Unknownuserfrommars 137 452 9ms 5 Aug 2025 799th JOrE20 🇺🇸 137 452 9ms 6 Nov 2025 813th dokutan 136 273 3ms 13 Nov 2024 814th KasperKivimaeki 🇫🇮 136 457 9ms 15 Jul 2025 815th HumanoidCPU 136 575 41ms 9 Mar 2025 816th Upload-and-View 🇺🇦 135 458 9ms 9 Aug 2025 817th KatieLG 🇬🇧 135 465 110ms 23 days ago 818th Shanethegamer 🇺🇸 134 452 335ms 1 Nov 2024 819th dokutan 134 473 2ms 1 Nov 2024 820th KatieLG 🇬🇧 133 475 1ms 1 Nov 2024 821st KatieLG 🇬🇧 132 487 1ms 23 days ago 822nd KatieLG 🇬🇧 131 443 2ms 23 days ago 823rd HumanoidCPU 131 444 2ms 1 Nov 2024 823rd Shanethegamer 🇺🇸 131 444 3ms 1 Nov 2024 823rd dokutan 131 444 2ms 1 Nov 2024 823rd MeWhenI 🇻🇦 131 444 2ms 2 Nov 2024 823rd CaedenHarper 🇨🇦 131 444 2ms 16 Aug 2025 828th KatieLG 🇬🇧 130 515 2ms 8 Jan 2025 829th KatieLG 🇬🇧 127 530 1ms 1 Nov 2024 830th sciencejiho 127 532 2ms 12 Feb 2025 831st MeWhenI 🇻🇦 124 515 1ms 2 Nov 2024 831st CaedenHarper 🇨🇦 124 515 1ms 12 Nov 2025 831st Shanethegamer 🇺🇸 124 515 1ms 12 Nov 2025 831st HumanoidCPU 124 515 1ms 12 Nov 2025 835th Shanethegamer 🇺🇸 122 445 53ms 1 Nov 2024 835th CaedenHarper 🇨🇦 122 445 40ms 16 Aug 2025 837th HumanoidCPU 122 518 2ms 1 Nov 2024 837th Shanethegamer 🇺🇸 122 518 2ms 1 Nov 2024 837th MeWhenI 🇻🇦 122 518 2ms 2 Nov 2024 837th CaedenHarper 🇨🇦 122 518 1ms 22 Jan 2025 841st HumanoidCPU 119 446 8ms 1 Nov 2024 841st MeWhenI 🇻🇦 119 446 8ms 2 Nov 2024 841st zakariamouhid 119 446 9ms 17 Nov 2024 841st Salutations45 119 446 8ms 22 Nov 2024 841st gigaprofisi 🇺🇸 119 446 9ms 20 Jun 2025 841st didion0 🇺🇸 119 446 9ms 26 Aug 2025 841st olleicua 🇺🇸 119 446 9ms 10 Sep 2025 848th iczelia 🇩🇪 119 447 9ms 24 Oct 2025 849th Quadruplay 119 448 8ms 12 Jul 2025 850th HumanoidCPU 117 446 1,005ms 1 Nov 2024 850th Shanethegamer 🇺🇸 117 446 998ms 1 Nov 2024 850th dokutan 117 446 967ms 1 Nov 2024 850th CaedenHarper 🇨🇦 117 446 1,033ms 24 Jan 2025 854th JOrE20 🇺🇸 116 457 9ms 6 Nov 2025 855th KatieLG 🇬🇧 114 461 780ms 23 days ago 856th HumanoidCPU 113 448 152ms 1 Nov 2024 856th MeWhenI 🇻🇦 113 448 188ms 2 Nov 2024 856th CaedenHarper 🇨🇦 113 448 223ms 1 Feb 2025 859th dokutan 110 453 124ms 1 Nov 2024 859th Shanethegamer 🇺🇸 110 453 117ms 1 Nov 2024 859th KatieLG 🇬🇧 110 453 114ms 1 Nov 2024 859th MeWhenI 🇻🇦 110 453 116ms 2 Nov 2024 859th CaedenHarper 🇨🇦 110 453 116ms 24 Jan 2025 864th KatieLG 🇬🇧 110 1,387 4ms 1 Nov 2024 865th KatieLG 🇬🇧 109 467 223ms 23 days ago 866th HumanoidCPU 96 520 113ms 1 Nov 2024 867th HumanoidCPU 93 449 32ms 1 Nov 2024 867th MeWhenI 🇻🇦 93 449 30ms 2 Nov 2024 867th CaedenHarper 🇨🇦 93 449 36ms 25 Jan 2025 867th snoozingnewt 🇨🇦 93 449 32ms 14 Sep 2025 871st KatieLG 🇬🇧 93 451 32ms 1 Nov 2024 872nd dokutan 91 462 32ms 1 Nov 2024 873rd CaedenHarper 🇨🇦 89 882 48ms 25 Jan 2025 874th emgordon154 88 866 1,357ms 27 days ago 875th CaedenHarper 🇨🇦 85 1,015 2ms 22 Jan 2025 876th MeWhenI 🇻🇦 84 439 2ms 2 Nov 2024 876th CaedenHarper 🇨🇦 84 439 2ms 16 Aug 2025 878th HumanoidCPU 83 444 2ms 1 Nov 2024 879th KatieLG 🇬🇧 72 511 2ms 1 Nov 2024 880th AidanWalter 68 915 12ms 3 Jan 2025 First Prev 801–880 of 980 Next Last