The Calendar hole will go live in approximately 8 days. Why not try and solve it ahead of time?
Lucky Numbers in all languages in bytes. 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 Bytes Time Submitted 640th KatieLG 🇬🇧 595 84 430ms 17 Aug 2024 642nd strout 595 106 528ms 17 Aug 2022 643rd edsrzf 🇳🇿 592 129 11ms 11 Nov 2025 644th Re-Adventures 🇮🇳 591 154 153ms 20 Jul 2023 645th albanian-laundromat 590 98 1,492ms 5 Nov 2025 646th Troon 589 89 39ms 29 Sep 2022 646th b10011 🇫🇮 589 89 35ms 8 Jan 2023 646th AbhilashaTandon 589 89 11ms 24 Sep 2023 646th eddvrs 589 89 10ms 20 Dec 2023 650th junkondo-jp 589 97 30ms 25 Jun 2024 650th CaedenHarper 🇨🇦 589 97 19ms 27 Jan 2025 652nd DaCuteRaccoon 588 326 824ms 1 Dec 2022 653rd emgordon154 587 47 51ms 3 Nov 2024 654th MeWhenI 🇻🇦 587 110 15ms 21 Jul 2023 655th albanian-laundromat 587 137 89ms 4 Sep 2025 656th jfallon1997 583 90 31ms 7 Sep 2022 656th xDragoxboi 583 90 12ms 30 Jun 2025 656th jacekwladzinski 583 90 11ms 5 Oct 2025 659th trinityy-7 583 98 13ms 17 Mar 2024 659th snoozingnewt 🇨🇦 583 98 19ms 29 Sep 2025 659th iczelia 🇩🇪 583 98 18ms 17 Oct 2025 662nd keelimeguy 🇺🇸 583 192 268ms 28 Apr 2025 663rd Shanethegamer 🇺🇸 581 79 39ms 7 Jun 2022 664th kimbo 🇺🇸 580 193 268ms 13 Jan 2023 665th MeWhenI 🇻🇦 579 87 1,820ms 28 Jan 2023 666th CaedenHarper 🇨🇦 579 331 340ms 27 Jan 2025 667th Shanethegamer 🇺🇸 578 117 35ms 12 Sep 2022 668th CaedenHarper 🇨🇦 577 194 275ms 20 days ago 669th albanian-laundromat 577 332 3,099ms 15 days ago 670th commandblockguy 🇺🇸 576 91 102ms 21 Sep 2022 670th MaxElf999 576 91 3,023ms 28 Sep 2022 670th fkantelberg 576 91 54ms 7 Aug 2023 670th sultan 576 91 29ms 5 Mar 2024 674th 5cw 🇺🇸 575 48 7ms 10 Apr 2023 675th msbranicky 574 87 473ms 17 Jan 2024 676th MeWhenI 🇻🇦 573 101 963ms 15 Sep 2025 677th 77Tigers 573 110 319ms 29 May 2024 677th iczelia 🇩🇪 573 110 274ms 17 Oct 2025 679th anter69 🇭🇺 572 78 106ms 12 Feb 2024 680th advl 572 100 84ms 14 Feb 2025 681st NickTheEASDude 🇺🇸 571 121 24ms 1 May 2024 682nd Ailko 🇧🇪 570 92 10ms 6 May 2022 682nd ComputerKWasTaken 🇺🇸 570 92 11ms 23 Oct 2024 684th commandblockguy 🇺🇸 568 88 594ms 1 Sep 2025 685th emgordon154 568 160 210ms 5 Mar 2025 686th a6166231 🇨🇳 566 101 11ms 5 Jun 2025 687th MeWhenI 🇻🇦 566 149 42ms 6 Jun 2023 688th KatieLG 🇬🇧 565 109 178ms 22 Jan 2023 689th madex 🇩🇪 565 122 3ms 29 Mar 2022 690th KatieLG 🇬🇧 565 198 373ms 22 Jan 2023 691st TobyBoyne 🇬🇧 564 93 3,068ms 3 Mar 2022 691st jtaxen 564 93 98ms 26 Mar 2024 691st jameswmccarty 564 93 11ms 10 Jul 2024 691st codingisgreatbutiamnot 564 93 630ms 6 Aug 2025 695th Shanethegamer 🇺🇸 564 150 96ms 4 Oct 2024 696th rak1507 🇬🇧 563 49 2ms 2 Mar 2022 697th h3ra993huskp 🇯🇵 563 163 494ms 23 days ago 698th KatieLG 🇬🇧 562 142 472ms 13 Nov 2022 699th pzagrebin 561 99 64ms 9 Jul 2022 699th janbehrens 🇩🇪 561 99 141ms 2 Jul 2023 701st DaCuteRaccoon 561 102 17ms 30 Nov 2022 701st dylanarmstrong 561 102 11ms 21 Jan 2024 701st acollett89 561 102 29ms 18 Jul 2025 704th heanyang1 560 200 260ms 29 May 2025 705th adamnielson42 🇺🇸 558 94 59ms 21 Aug 2023 705th brochmann 🇸🇪 558 94 11ms 28 Oct 2023 705th 40fied4t 558 94 35ms 1 Jun 2025 708th olleicua 🇺🇸 557 80 81ms 21 Feb 2025 709th kkoenig 557 201 274ms 7 Sep 2025 710th HumanoidCPU 556 119 133ms 7 Nov 2024 711th Lv0Sys 🇵🇱 555 103 32ms 16 days ago 712th HumanoidCPU 554 202 268ms 26 Aug 2024 713th albanian-laundromat 554 260 1,952ms 23 Oct 2025 714th varhammer 🇷🇺 553 153 210ms 13 Dec 2023 715th CatsAreFluffy 553 157 78ms 10 Jan 2023 716th m42km 552 95 48ms 16 Dec 2023 716th Natanaelel 🇸🇪 552 95 29ms 15 Jul 2025 718th TheLazySquid 550 104 178ms 26 Sep 2024 719th j-Ewan 546 96 98ms 4 Mar 2022 719th nullie 546 96 79ms 9 Jun 2022 First Prev 641–720 of 1,537 Next Last