The Calendar hole will go live in approximately 5 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 881st KatieLG 🇬🇧 72 511 2ms 1 Nov 2024 882nd AidanWalter 68 915 12ms 3 Jan 2025 882nd sciencejiho 68 915 10ms 12 Feb 2025 884th HumanoidCPU 62 1,259 48ms 13 Aug 2025 885th ovs-code 🇩🇪 0 35 4,566ms 19 May 2025 886th ovs-code 🇩🇪 0 47 4,438ms 30 May 2025 887th ovs-code 🇩🇪 0 50 2,400ms 25 Jul 2025 888th sean-niemann 🇺🇸 0 65 3,398ms 29 Apr 2025 889th DialFrost 🇸🇬 0 82 789ms 29 Jul 2025 890th DialFrost 🇸🇬 0 98 4,487ms 9 Feb 2025 891st Shanethegamer 🇺🇸 0 217 153ms 24 May 2025 892nd Shanethegamer 🇺🇸 0 439 55ms 22 May 2025 893rd Shanethegamer 🇺🇸 0 440 396ms 17 Apr 2025 893rd HumanoidCPU 0 440 393ms 18 Aug 2025 893rd HumanoidCPU 0 440 50ms 18 Aug 2025 893rd HumanoidCPU 0 440 138ms 18 Aug 2025 897th Shanethegamer 🇺🇸 0 441 94ms 17 Apr 2025 897th KatieLG 🇬🇧 0 441 95ms 20 Apr 2025 897th Shanethegamer 🇺🇸 0 441 1ms 5 Aug 2025 897th HumanoidCPU 0 441 1ms 18 Aug 2025 897th HumanoidCPU 0 441 94ms 18 Aug 2025 902nd Shanethegamer 🇺🇸 0 442 441ms 17 Apr 2025 902nd KatieLG 🇬🇧 0 442 136ms 20 Apr 2025 902nd KatieLG 🇬🇧 0 442 307ms 23 Apr 2025 902nd Shanethegamer 🇺🇸 0 442 15ms 30 May 2025 902nd HumanoidCPU 0 442 430ms 18 Aug 2025 907th Shanethegamer 🇺🇸 0 445 2ms 17 Apr 2025 907th HumanoidCPU 0 445 3ms 18 Aug 2025 909th Shanethegamer 🇺🇸 0 446 2ms 2 May 2025 909th Shanethegamer 🇺🇸 0 446 6ms 2 May 2025 911th Shanethegamer 🇺🇸 0 448 9ms 17 Apr 2025 911th HumanoidCPU 0 448 9ms 18 Aug 2025 911th Shanethegamer 🇺🇸 0 448 2ms 18 Sep 2025 911th HumanoidCPU 0 448 2ms 6 Oct 2025 911th kurkale6ka 0 448 9ms 14 days ago 916th Shanethegamer 🇺🇸 0 449 157ms 16 Apr 2025 916th Shanethegamer 🇺🇸 0 449 15ms 17 Apr 2025 916th Shanethegamer 🇺🇸 0 449 83ms 17 Apr 2025 916th Shanethegamer 🇺🇸 0 449 2ms 1 May 2025 916th Shanethegamer 🇺🇸 0 449 132ms 2 Jul 2025 916th HumanoidCPU 0 449 132ms 18 Aug 2025 916th HumanoidCPU 0 449 15ms 18 Aug 2025 916th HumanoidCPU 0 449 82ms 18 Aug 2025 916th HumanoidCPU 0 449 2ms 18 Aug 2025 916th HumanoidCPU 0 449 160ms 18 Aug 2025 926th KatieLG 🇬🇧 0 450 1ms 21 Nov 2025 927th Shanethegamer 🇺🇸 0 452 1,102ms 16 Apr 2025 927th Shanethegamer 🇺🇸 0 452 1ms 17 Apr 2025 927th HumanoidCPU 0 452 1ms 18 Aug 2025 927th HumanoidCPU 0 452 1,041ms 18 Aug 2025 931st Shanethegamer 🇺🇸 0 454 7ms 17 Apr 2025 931st HumanoidCPU 0 454 7ms 18 Aug 2025 933rd Shanethegamer 🇺🇸 0 457 61ms 16 Apr 2025 933rd HumanoidCPU 0 457 57ms 18 Aug 2025 935th Shanethegamer 🇺🇸 0 460 4ms 37 hours ago 936th Shanethegamer 🇺🇸 0 466 65ms 3 Jul 2025 937th HumanoidCPU 0 468 88ms 18 Aug 2025 938th Shanethegamer 🇺🇸 0 487 370ms 17 Apr 2025 938th HumanoidCPU 0 487 340ms 18 Aug 2025 940th Shanethegamer 🇺🇸 0 493 301ms 11 May 2025 940th HumanoidCPU 0 493 252ms 19 days ago 942nd KatieLG 🇬🇧 0 508 49ms 20 Apr 2025 943rd KatieLG 🇬🇧 0 509 439ms 20 Apr 2025 944th KatieLG 🇬🇧 0 510 2ms 9 Feb 2025 944th HumanoidCPU 0 510 2ms 18 Aug 2025 944th Shanethegamer 🇺🇸 0 510 2ms 23 Sep 2025 947th KatieLG 🇬🇧 0 513 2ms 20 Apr 2025 947th HumanoidCPU 0 513 2ms 18 Aug 2025 949th KatieLG 🇬🇧 0 515 3ms 20 Apr 2025 949th KatieLG 🇬🇧 0 515 1,091ms 20 Apr 2025 949th KatieLG 🇬🇧 0 515 2ms 21 Nov 2025 952nd KatieLG 🇬🇧 0 516 12ms 20 Apr 2025 952nd KatieLG 🇬🇧 0 516 82ms 20 Apr 2025 952nd KatieLG 🇬🇧 0 516 9ms 20 Apr 2025 955th KatieLG 🇬🇧 0 517 158ms 23 Apr 2025 956th KatieLG 🇬🇧 0 519 2ms 20 Apr 2025 957th KatieLG 🇬🇧 0 520 57ms 23 Apr 2025 958th KatieLG 🇬🇧 0 521 8ms 20 Apr 2025 959th HumanoidCPU 0 527 3ms 18 Aug 2025 960th KatieLG 🇬🇧 0 529 132ms 24 Oct 2025 First Prev 881–960 of 982 Next Last
