The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Zeckendorf Representation 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 561st KatieLG 🇬🇧 604 147 543ms 20 Apr 2025 562nd LukeBridges 🇬🇧 601 115 10ms 10 Oct 2024 563rd olleicua 🇺🇸 600 109 36ms 3 Jul 2024 564th edsrzf 🇳🇿 599 181 9ms 24 Nov 2024 565th MarcMush 🇫🇷 597 118 522ms 31 Jul 2024 565th bitsandbeyond 🇳🇱 597 118 262ms 25 days ago 567th jared-hughes 596 113 23ms 4 Jul 2024 568th madex 🇩🇪 594 180 10ms 1 Jul 2024 569th emgordon154 592 183 8ms 13 Dec 2024 570th junkondo-jp 591 117 9ms 15 Dec 2024 571st MeWhenI 🇻🇦 588 193 126ms 1 Jul 2024 572nd Salutations45 583 97 3ms 29 Dec 2024 573rd KatieLG 🇬🇧 579 113 34ms 1 Jul 2024 574th robin-scragg 578 185 10ms 5 Jul 2025 575th ginop 575 186 10ms 2 Jul 2024 575th inverseLorentz 🇦🇺 575 186 10ms 8 Jul 2024 577th alemelis 573 123 802ms 26 Aug 2024 578th dokutan 567 122 9ms 5 Jun 2025 579th msbranicky 567 235 178ms 4 Jul 2024 580th OllieBoyne 🇬🇧 566 189 10ms 12 Jul 2024 581st msbranicky 563 165 139ms 4 Jul 2024 582nd bac0id 561 182 359ms 1 Jul 2024 583rd alexsave 558 124 9ms 13 Nov 2024 584th bac0id 556 155 2ms 3 Jul 2024 585th dokutan 555 160 564ms 2 Jul 2024 586th Mabeloid 🇳🇴 554 193 11ms 11 Sep 2024 587th MeWhenI 🇻🇦 548 179 77ms 9 Aug 2024 588th dokutan 545 136 132ms 5 Aug 2024 589th weliveinhell 🇭🇹 544 127 9ms 4 Jul 2024 590th dokutan 541 121 53ms 28 Sep 2024 591st MeWhenI 🇻🇦 540 199 1,243ms 2 Jul 2024 592nd zakariamouhid 536 129 10ms 3 Jul 2024 593rd snoozingnewt 🇨🇦 532 130 10ms 29 Sep 2025 594th zt14427 527 203 9ms 1 Jul 2024 595th luuumine 🇫🇷 519 166 2ms 17 days ago 596th dokutan 517 180 148ms 1 Jul 2024 597th bitsandbeyond 🇳🇱 517 258 177ms 25 days ago 598th Maximizer02 516 210 13ms 24 Jul 2024 599th madex 🇩🇪 515 127 42ms 1 Jul 2024 600th klixel 🇨🇦 515 259 225ms 9 Jan 2025 601st MeWhenI 🇻🇦 511 198 47ms 6 Aug 2024 602nd KatieLG 🇬🇧 508 136 11ms 1 Jul 2024 603rd msbranicky 508 265 57ms 4 Jul 2024 604th 0xjac 🇨🇭 506 269 290ms 19 Jun 2025 605th ComputerKWasTaken 🇺🇸 503 130 33ms 4 Jul 2024 606th MeWhenI 🇻🇦 503 235 30ms 1 Jul 2024 607th bitsandbeyond 🇳🇱 502 268 60ms 25 days ago 608th bac0id 497 225 439ms 1 Jul 2024 609th coreynash 494 140 10ms 2 Jul 2024 609th two-bad 🇬🇧 494 140 10ms 4 Oct 2024 611th MeWhenI 🇻🇦 488 172 11ms 13 Aug 2024 612th bitsandbeyond 🇳🇱 485 146 6ms 25 days ago 613th dieggsy 485 209 15ms 16 Oct 2024 614th jameswmccarty 484 221 10ms 10 Jul 2024 615th msbranicky 483 146 223ms 4 Jul 2024 616th CatsAreFluffy 480 227 83ms 3 Nov 2024 617th MeWhenI 🇻🇦 479 116 148ms 7 Aug 2024 618th iczelia 🇩🇪 471 183 2ms 16 Oct 2025 619th ComputerKWasTaken 🇺🇸 471 210 2ms 1 Jul 2024 620th snoozingnewt 🇨🇦 469 184 2ms 9 Oct 2025 621st azure-blondon 469 228 10ms 7 Jul 2024 622nd yuchuehw 467 229 10ms 5 Jul 2024 623rd TheZwierzLF 🇵🇱 463 192 607ms 4 days ago 624th acollett89 461 150 9ms 5 Aug 2025 625th Mabeloid 🇳🇴 460 193 794ms 17 Sep 2024 626th xyangst 458 151 10ms 15 Oct 2024 627th LHLaurini 🇧🇷 453 139 52ms 1 Jul 2024 628th jtaxen 453 250 127ms 2 Jul 2024 629th tomh1012 450 227 419ms 23 Jul 2024 630th dokutan 444 244 6ms 17 Jul 2025 631st MeWhenI 🇻🇦 443 152 18ms 1 Jul 2024 632nd TheZwierzLF 🇵🇱 442 242 12ms 23 days ago 633rd madex 🇩🇪 441 180 834ms 1 Jul 2024 634th galloj 🇨🇿 440 243 15ms 26 Aug 2024 635th snoozingnewt 🇨🇦 436 86 3ms 7 Oct 2025 636th c4augustus 431 87 2ms 16 Jul 2024 637th Flobois 429 158 264ms 23 Jul 2024 638th CatsAreFluffy 415 208 2ms 3 Nov 2024 639th madex 🇩🇪 412 168 9ms 1 Jul 2024 640th IISResetMe 409 166 238ms 4 Jul 2024 First Prev 561–640 of 694 Next Last