The Calendar hole will go live in approximately 28 hours. Why not try and solve it ahead of time?
Van Eck Sequence 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 801st msbranicky 633 102 3,786ms 9 Jan 2025 802nd Shanethegamer 🇺🇸 631 49 3ms 16 Sep 2021 803rd alemelis 631 70 2,045ms 19 Aug 2024 804th 4hg 🇺🇸 630 38 130ms 28 Jan 2023 805th florton 630 65 9ms 7 Jan 2022 805th Garklein 🇨🇦 630 65 14ms 7 Jan 2022 805th xyangst 630 65 10ms 12 Oct 2024 808th hymanimy 629 86 49ms 24 Aug 2021 808th FortuiteMan 🇫🇷 629 86 49ms 20 Aug 2023 808th Azearia 629 86 10ms 23 Oct 2023 808th Techdude01 629 86 13ms 21 Dec 2023 808th yuchuehw 629 86 14ms 4 Feb 2024 808th dokutan 629 86 14ms 9 Feb 2025 808th Flekay 🇩🇪 629 86 15ms 11 Jul 2025 808th LostSyntax21 🇬🇧 629 86 16ms 30 Nov 2025 816th Lydxn 🇨🇦 629 123 387ms 2 Feb 2022 817th janbehrens 🇩🇪 627 62 284ms 3 Dec 2023 818th emplv 🇱🇻 627 86 97ms 20 Dec 2022 819th snoozingnewt 🇨🇦 627 103 3,335ms 13 Oct 2025 820th jerrandolph 627 152 300ms 3 Nov 2023 820th JRaspass 🇬🇧 627 152 266ms 7 Feb 2024 822nd MeWhenI 🇻🇦 625 110 1,246ms 14 Jun 2023 823rd Adix-null 🇱🇹 625 116 339ms 17 May 2023 824th Shanethegamer 🇺🇸 622 55 113ms 9 Jan 2022 825th DialFrost 🇸🇬 622 71 610ms 23 Jul 2024 826th MichalMarsalek 🇨🇿 622 87 16ms 3 Dec 2021 826th willschremmer 622 87 22ms 4 Apr 2024 826th jatloe 622 87 39ms 27 Sep 2024 829th olivermrose 🇺🇸 621 66 21ms 26 Sep 2021 829th scpchicken 🇵🇼 621 66 22ms 17 May 2023 831st frankgraziano 620 58 13ms 21 Feb 2023 832nd lynn 620 126 159ms 10 Mar 2022 833rd janbehrens 🇩🇪 619 50 3ms 1 May 2021 833rd kurkale6ka 619 50 3ms 14 Jul 2021 835th primo-ppcg 🇹🇭 619 125 410ms 2 Aug 2021 836th varhammer 🇷🇺 617 99 20ms 13 Dec 2023 837th janAkali 🇷🇺 615 85 117ms 17 May 2025 838th befoster 615 88 23ms 8 May 2021 838th mrmena 🇦🇺 615 88 55ms 6 Jul 2021 838th martinnorling 🇸🇪 615 88 17ms 10 Feb 2022 838th abba23 615 88 14ms 27 May 2022 838th bbakersmith 615 88 14ms 28 Jun 2022 838th santiagvalencia 615 88 23ms 6 Mar 2025 844th MeWhenI 🇻🇦 615 276 14ms 29 Aug 2023 845th Meowsan91 🇨🇿 614 118 317ms 21 Nov 2021 846th Shanethegamer 🇺🇸 613 97 2ms 28 Dec 2022 847th elisherer 🇮🇱 612 67 21ms 7 Oct 2021 848th emgordon154 610 88 18ms 8 Dec 2024 849th albanian-laundromat 610 96 179ms 9 Nov 2025 850th marcin7Cd 610 100 12ms 1 May 2021 851st emgordon154 609 134 20ms 21 Nov 2024 852nd bastienvoirin 🇫🇷 608 89 16ms 14 Sep 2021 852nd Troon 608 89 50ms 18 Oct 2022 852nd PaulMWeiser 608 89 17ms 5 Mar 2023 852nd aalec 608 89 23ms 25 Apr 2024 852nd ComputerKWasTaken 🇺🇸 608 89 10ms 23 Jan 2025 852nd ImpressedByRocks 608 89 59ms 13 Feb 2025 852nd smilesformiles3 608 89 54ms 24 Sep 2025 859th GitMensch 607 280 20ms 10 days ago 860th MeWhenI 🇻🇦 606 89 101ms 14 Oct 2022 861st msbranicky 606 224 1,714ms 16 Sep 2025 862nd emgordon154 605 110 109ms 25 days ago 863rd Shanethegamer 🇺🇸 605 131 409ms 24 Mar 2023 864th snoozingnewt 🇨🇦 603 64 1ms 13 Oct 2025 865th neel11235813 603 68 21ms 4 Apr 2023 865th madeforlosers 603 68 25ms 16 Oct 2023 867th AkashTandon167 601 90 14ms 1 Nov 2021 867th jfallon1997 601 90 74ms 9 Aug 2022 867th myleopard 601 90 18ms 22 Dec 2022 867th thienudomsrirungruang 601 90 15ms 14 Nov 2024 867th JunkIce 601 90 24ms 3 Dec 2024 872nd CaedenHarper 🇨🇦 600 129 451ms 5 Oct 2025 873rd HumanoidCPU 599 159 311ms 7 days ago 874th Hillsoft 598 90 128ms 27 Jul 2022 875th MaxElf999 595 91 21ms 27 Sep 2022 875th aaardwark 595 91 17ms 2 Jun 2025 875th YAJUE114514 595 91 17ms 3 Jul 2025 875th osNiko 🇧🇷 595 91 17ms 22 Aug 2025 879th Jonatan6 🇩🇰 595 100 2ms 27 Apr 2024 879th Herbert00709 🇵🇱 595 100 2ms 1 Nov 2024 First Prev 801–880 of 1,809 Next Last