The Calendar hole will go live in approximately 8 days. Why not try and solve it ahead of time?
Jacobi Symbol 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 161st MeWhenI 🇻🇦 806 177 20ms 11 May 2022 162nd m-tkach 🇺🇦 805 138 34ms 10 May 2022 162nd inventshah 805 138 31ms 13 May 2022 162nd lynn 805 138 10ms 4 Jun 2022 165th MeWhenI 🇻🇦 803 177 445ms 7 Nov 2025 166th primo-ppcg 🇹🇭 803 195 241ms 30 May 2022 167th nipzu 800 98 51ms 10 Sep 2024 168th blaztoma 🇱🇹 800 108 257ms 13 Oct 2025 169th GrayJoKing 🇦🇺 799 104 9ms 20 May 2022 170th sean-niemann 🇺🇸 799 178 453ms 24 Sep 2025 170th ScottHamper 799 178 452ms 23 days ago 172nd saito-ta 🇯🇵 798 80 18ms 13 Jun 2022 173rd primo-ppcg 🇹🇭 794 179 413ms 21 May 2022 174th canissimia 🇦🇶 794 433 10ms 17 Jun 2022 175th jared-hughes 793 140 11ms 19 Jul 2022 175th ryyyn 🇺🇸 793 140 29ms 13 Nov 2025 177th kg583 🇺🇸 792 124 471ms 19 Jan 2024 178th inventshah 790 157 462ms 30 Jan 2024 179th ovs-code 🇩🇪 789 167 377ms 14 Sep 2024 180th annaproxy 788 141 10ms 20 May 2022 180th MeWhenI 🇻🇦 788 141 11ms 22 May 2024 180th emgordon154 788 141 10ms 28 Dec 2024 180th bizy-coder 788 141 29ms 26 days ago 184th kg583 🇺🇸 788 200 8ms 4 days ago 185th GolfingSuccess 🇬🇷 788 311 456ms 27 Jan 2025 186th antimon2 🇯🇵 786 110 356ms 18 Aug 2022 187th edsrzf 🇳🇿 785 213 40ms 30 Dec 2024 188th namelessiw 784 160 380ms 12 Oct 2025 189th GolfingSuccess 🇬🇷 782 142 11ms 21 May 2022 189th sean-niemann 🇺🇸 782 142 10ms 19 days ago 189th yujh-yujh 🇬🇸 782 142 10ms 12 days ago 192nd lynn 780 160 142ms 9 May 2022 193rd sisyphus-ppcg 🇦🇺 777 97 34ms 27 Dec 2023 194th pardouin 🇫🇷 777 104 883ms 27 Jul 2025 195th didion0 🇺🇸 777 107 10ms 11 May 2022 195th prplz 🇦🇺 777 107 9ms 14 May 2022 195th DialFrost 🇸🇬 777 107 10ms 3 days ago 198th stefangimmillaro 777 152 4,640ms 10 Nov 2024 199th pzagrebin 776 101 52ms 16 Jul 2022 200th rhdqor213 771 141 2ms 19 Mar 2024 201st edsrzf 🇳🇿 771 160 5ms 24 Jul 2025 202nd GrayJoKing 🇦🇺 769 94 137ms 20 May 2022 203rd stefangimmillaro 769 185 878ms 6 Oct 2025 204th edsrzf 🇳🇿 769 205 11ms 4 days ago 205th jared-hughes 768 548 27ms 21 Dec 2024 206th lifthrasiir 🇰🇷 766 145 10ms 14 Nov 2024 207th JohandeRuiter 🇳🇱 765 142 2ms 3 Aug 2024 208th inventshah 761 129 562ms 21 Jan 2024 209th TFeld00 🇩🇰 761 146 18ms 18 May 2022 209th Command-Master 761 146 18ms 29 Sep 2023 211th inventshah 760 143 2ms 9 Feb 2023 212th CaedenHarper 🇨🇦 757 132 802ms 6 Nov 2025 213th edsrzf 🇳🇿 757 136 2ms 11 Nov 2025 214th jared-hughes 756 164 501ms 23 Oct 2022 215th Irratix 🇳🇱 755 110 9ms 11 May 2022 216th Irratix 🇳🇱 755 147 16ms 10 May 2022 216th quimey 755 147 10ms 23 Mar 2023 216th ZakkkkAttackkkk 🇵🇭 755 147 10ms 31 Aug 2023 216th bricknellj 755 147 10ms 24 Jun 2024 220th MeWhenI 🇻🇦 754 168 107ms 23 Jun 2024 221st xsot 🇸🇬 753 83 4ms 20 Jun 2025 222nd sean-niemann 🇺🇸 752 137 2ms 19 Nov 2025 223rd jared-hughes 750 145 2ms 23 Oct 2022 224th retrohun 750 148 11ms 21 May 2022 224th argusdusty 🇺🇸 750 148 17ms 21 Aug 2022 224th SirBogman 🇺🇸 750 148 16ms 28 Oct 2022 227th sean-niemann 🇺🇸 750 169 112ms 27 Dec 2024 228th emplv 🇱🇻 749 111 10ms 9 May 2022 228th emgordon154 749 111 10ms 28 Dec 2024 230th emgordon154 749 327 474ms 1 Jun 2025 231st msbranicky 748 158 278ms 31 Aug 2023 232nd MeWhenI 🇻🇦 746 209 2ms 12 Sep 2022 233rd MarcMush 🇫🇷 745 116 429ms 14 Jan 2024 234th Irratix 🇳🇱 745 146 2ms 9 May 2022 235th jatloe 745 149 10ms 23 Aug 2024 236th emgordon154 744 132 575ms 28 Dec 2024 237th MeWhenI 🇻🇦 744 199 8ms 23 Jun 2024 238th Irratix 🇳🇱 743 167 427ms 9 May 2022 238th sean-niemann 🇺🇸 743 167 514ms 10 Jun 2024 240th inventshah 742 112 10ms 13 May 2022 First Prev 161–240 of 706 Next Last