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 880th sciencejiho 68 915 10ms 12 Feb 2025 882nd HumanoidCPU 62 1,259 48ms 13 Aug 2025 883rd ovs-code 🇩🇪 0 35 4,566ms 19 May 2025 884th ovs-code 🇩🇪 0 47 4,438ms 30 May 2025 885th ovs-code 🇩🇪 0 50 2,400ms 25 Jul 2025 886th sean-niemann 🇺🇸 0 65 3,398ms 29 Apr 2025 887th DialFrost 🇸🇬 0 82 789ms 29 Jul 2025 888th DialFrost 🇸🇬 0 98 4,487ms 9 Feb 2025 889th Shanethegamer 🇺🇸 0 217 153ms 24 May 2025 890th Shanethegamer 🇺🇸 0 439 54ms 22 May 2025 891st Shanethegamer 🇺🇸 0 440 396ms 17 Apr 2025 891st HumanoidCPU 0 440 393ms 18 Aug 2025 891st HumanoidCPU 0 440 49ms 18 Aug 2025 891st HumanoidCPU 0 440 138ms 18 Aug 2025 895th Shanethegamer 🇺🇸 0 441 94ms 17 Apr 2025 895th KatieLG 🇬🇧 0 441 95ms 20 Apr 2025 895th Shanethegamer 🇺🇸 0 441 1ms 5 Aug 2025 895th HumanoidCPU 0 441 1ms 18 Aug 2025 895th HumanoidCPU 0 441 94ms 18 Aug 2025 900th Shanethegamer 🇺🇸 0 442 441ms 17 Apr 2025 900th KatieLG 🇬🇧 0 442 136ms 20 Apr 2025 900th KatieLG 🇬🇧 0 442 307ms 23 Apr 2025 900th Shanethegamer 🇺🇸 0 442 15ms 30 May 2025 900th HumanoidCPU 0 442 430ms 18 Aug 2025 905th Shanethegamer 🇺🇸 0 445 2ms 17 Apr 2025 905th HumanoidCPU 0 445 3ms 18 Aug 2025 907th Shanethegamer 🇺🇸 0 446 2ms 2 May 2025 907th Shanethegamer 🇺🇸 0 446 6ms 2 May 2025 909th Shanethegamer 🇺🇸 0 448 13ms 17 Apr 2025 909th HumanoidCPU 0 448 9ms 18 Aug 2025 909th Shanethegamer 🇺🇸 0 448 2ms 18 Sep 2025 909th HumanoidCPU 0 448 2ms 6 Oct 2025 909th kurkale6ka 0 448 11ms 12 days ago 914th Shanethegamer 🇺🇸 0 449 157ms 16 Apr 2025 914th Shanethegamer 🇺🇸 0 449 18ms 17 Apr 2025 914th Shanethegamer 🇺🇸 0 449 83ms 17 Apr 2025 914th Shanethegamer 🇺🇸 0 449 2ms 1 May 2025 914th Shanethegamer 🇺🇸 0 449 136ms 2 Jul 2025 914th HumanoidCPU 0 449 132ms 18 Aug 2025 914th HumanoidCPU 0 449 17ms 18 Aug 2025 914th HumanoidCPU 0 449 82ms 18 Aug 2025 914th HumanoidCPU 0 449 2ms 18 Aug 2025 914th HumanoidCPU 0 449 160ms 18 Aug 2025 924th KatieLG 🇬🇧 0 450 1ms 21 Nov 2025 925th Shanethegamer 🇺🇸 0 452 1,102ms 16 Apr 2025 925th Shanethegamer 🇺🇸 0 452 1ms 17 Apr 2025 925th HumanoidCPU 0 452 1ms 18 Aug 2025 925th HumanoidCPU 0 452 1,041ms 18 Aug 2025 929th Shanethegamer 🇺🇸 0 454 7ms 17 Apr 2025 929th HumanoidCPU 0 454 7ms 18 Aug 2025 931st Shanethegamer 🇺🇸 0 457 61ms 16 Apr 2025 931st HumanoidCPU 0 457 57ms 18 Aug 2025 933rd Shanethegamer 🇺🇸 0 466 65ms 3 Jul 2025 934th HumanoidCPU 0 468 88ms 18 Aug 2025 935th Shanethegamer 🇺🇸 0 487 370ms 17 Apr 2025 935th HumanoidCPU 0 487 340ms 18 Aug 2025 937th Shanethegamer 🇺🇸 0 493 301ms 11 May 2025 937th HumanoidCPU 0 493 292ms 16 days ago 939th KatieLG 🇬🇧 0 508 50ms 20 Apr 2025 940th KatieLG 🇬🇧 0 509 439ms 20 Apr 2025 941st KatieLG 🇬🇧 0 510 2ms 9 Feb 2025 941st HumanoidCPU 0 510 2ms 18 Aug 2025 941st Shanethegamer 🇺🇸 0 510 2ms 23 Sep 2025 944th KatieLG 🇬🇧 0 513 2ms 20 Apr 2025 944th HumanoidCPU 0 513 2ms 18 Aug 2025 946th KatieLG 🇬🇧 0 515 3ms 20 Apr 2025 946th KatieLG 🇬🇧 0 515 1,091ms 20 Apr 2025 946th KatieLG 🇬🇧 0 515 2ms 21 Nov 2025 949th KatieLG 🇬🇧 0 516 12ms 20 Apr 2025 949th KatieLG 🇬🇧 0 516 82ms 20 Apr 2025 949th KatieLG 🇬🇧 0 516 10ms 20 Apr 2025 952nd KatieLG 🇬🇧 0 517 158ms 23 Apr 2025 953rd KatieLG 🇬🇧 0 519 2ms 20 Apr 2025 954th KatieLG 🇬🇧 0 520 57ms 23 Apr 2025 955th KatieLG 🇬🇧 0 521 8ms 20 Apr 2025 956th Shanethegamer 🇺🇸 0 527 3ms 28 Jul 2025 956th HumanoidCPU 0 527 3ms 18 Aug 2025 958th KatieLG 🇬🇧 0 529 132ms 24 Oct 2025 959th Shanethegamer 🇺🇸 0 535 4ms 20 Apr 2025 959th HumanoidCPU 0 535 4ms 18 Aug 2025 First Prev 881–960 of 980 Next Last
