The Calendar hole will go live in approximately 10 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 241st GolfingSuccess 🇬🇷 741 139 2ms 20 Nov 2025 242nd Shanethegamer 🇺🇸 740 150 11ms 11 May 2022 242nd stefangimmillaro 740 150 10ms 19 Sep 2023 242nd stertooy 🇧🇪 740 150 30ms 15 Jun 2024 242nd InigoK 🇺🇸 740 150 17ms 25 Aug 2025 242nd blaztoma 🇱🇹 740 150 10ms 11 Oct 2025 247th lifthrasiir 🇰🇷 739 147 1ms 30 Nov 2024 248th GolfingSuccess 🇬🇷 738 133 518ms 20 Jan 2024 249th kg583 🇺🇸 738 167 6ms 11 Nov 2025 250th sean-niemann 🇺🇸 737 165 431ms 10 Jun 2024 251st Shanethegamer 🇺🇸 737 193 451ms 24 Sep 2025 252nd stefangimmillaro 736 172 110ms 23 Oct 2023 253rd jared-hughes 735 113 9ms 19 Jul 2022 254th sean-niemann 🇺🇸 735 125 133ms 13 May 2025 255th ndren 735 151 17ms 21 Aug 2025 255th KasperKivimaeki 🇫🇮 735 151 18ms 3 days ago 257th m-tkach 🇺🇦 734 148 2ms 17 Jun 2022 257th sean-niemann 🇺🇸 734 148 2ms 10 Jun 2024 259th sean-niemann 🇺🇸 733 134 472ms 17 days ago 260th GolfingSuccess 🇬🇷 732 213 3ms 11 Sep 2022 261st NewDefectus 🇮🇱 731 152 11ms 10 May 2022 261st anter69 🇭🇺 731 152 29ms 16 Feb 2023 261st TaserTheFox 🇺🇸 731 152 17ms 26 May 2023 261st DialFrost 🇸🇬 731 152 183ms 14 Jan 2024 265th GolfingSuccess 🇬🇷 730 149 2ms 10 May 2022 266th AlephSquirrel 730 216 6ms 30 Oct 2024 267th MeWhenI 🇻🇦 730 291 1,669ms 7 Nov 2025 268th rucin93 🇵🇱 729 114 9ms 10 Jun 2024 268th vlpx 🇫🇮 729 114 10ms 23 Sep 2024 268th sean-niemann 🇺🇸 729 114 10ms 20 Jan 2025 271st GrayJoKing 🇦🇺 729 126 139ms 24 Oct 2024 271st rucin93 🇵🇱 729 126 133ms 3 Jan 2025 273rd rucin93 🇵🇱 729 195 478ms 24 Sep 2025 274th SirBogman 🇺🇸 728 135 688ms 16 Jan 2024 275th GrayJoKing 🇦🇺 728 181 380ms 24 Jul 2025 276th janbehrens 🇩🇪 726 153 30ms 17 Jun 2023 277th h3ra993huskp 🇯🇵 726 196 450ms 21 days ago 278th SirBogman 🇺🇸 724 112 330ms 2 Feb 2024 279th emgordon154 723 127 137ms 28 Dec 2024 280th lifthrasiir 🇰🇷 722 136 592ms 2 Dec 2024 281st elgan65536 721 154 10ms 4 Apr 2024 281st qpwoeirut 721 154 10ms 2 Oct 2025 281st CaedenHarper 🇨🇦 721 154 28ms 6 Nov 2025 284th DialFrost 🇸🇬 720 120 454ms 18 May 2024 285th UnderKoen 🇳🇱 720 177 7ms 20 Jan 2025 286th GrayJoKing 🇦🇺 720 211 124ms 26 May 2022 287th acotis 719 218 241ms 5 Jun 2025 288th bitsandbeyond 🇳🇱 718 113 289ms 5 Nov 2025 289th tomtheisen 🇺🇸 717 175 383ms 31 Jan 2025 290th YAJUE114514 716 155 10ms 15 Aug 2025 291st MeWhenI 🇻🇦 715 144 2ms 23 Jun 2024 292nd emplv 🇱🇻 714 150 100ms 20 Dec 2022 293rd NewDefectus 🇮🇱 713 110 50ms 20 May 2022 294th Sakisan 🇧🇪 713 175 138ms 11 May 2022 295th MeWhenI 🇻🇦 713 176 413ms 23 Jun 2024 296th stefangimmillaro 712 220 232ms 23 Oct 2023 297th SirBogman 🇺🇸 709 102 228ms 10 May 2022 298th sean-niemann 🇺🇸 709 177 408ms 20 Jun 2025 299th andersk 🇺🇸 709 221 225ms 29 Nov 2022 300th Shanethegamer 🇺🇸 708 179 111ms 11 May 2022 301st SirBogman 🇺🇸 707 67 3ms 9 May 2022 302nd CedricGebistorf 707 157 10ms 5 May 2023 303rd Kacarott 🇦🇺 706 157 72ms 28 Oct 2023 304th Shanethegamer 🇺🇸 705 176 448ms 12 May 2022 305th Shanethegamer 🇺🇸 704 118 10ms 11 May 2022 306th DialFrost 🇸🇬 704 142 115ms 22 Nov 2025 307th btjones0 703 158 16ms 15 Jul 2022 307th Just4FunCoder 703 158 17ms 26 Mar 2023 307th HumanoidCPU 703 158 10ms 9 Mar 2025 310th AlephSquirrel 702 57 49ms 26 Jun 2023 311th MeWhenI 🇻🇦 701 155 1ms 5 Jul 2024 312th CatsAreFluffy 700 112 51ms 31 Jan 2023 313th jared-hughes 700 151 3ms 19 Jul 2022 314th MeWhenI 🇻🇦 698 108 43ms 25 May 2022 314th jared-hughes 698 108 35ms 26 Dec 2023 316th guilhem-roy 🇫🇷 698 159 17ms 9 May 2022 316th OllieBoyne 🇬🇧 698 159 11ms 13 May 2022 316th TobyBoyne 🇬🇧 698 159 10ms 13 May 2022 316th KatieLG 🇬🇧 698 159 10ms 8 Jan 2023 316th duckyluuk 🇳🇱 698 159 30ms 15 Jul 2024 First Prev 241–320 of 706 Next Last