The Calendar hole will go live in approximately 11 days. Why not try and solve it ahead of time?
Jacobi Symbol in all languages in chars. 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 Chars Time Submitted 241st voytxt 🇨🇿 739 112 10ms 1 Mar 2023 241st KatieLG 🇬🇧 739 112 10ms 5 Oct 2025 243rd GolfingSuccess 🇬🇷 737 139 2ms 20 Nov 2025 244th ovs-code 🇩🇪 736 103 624ms 10 Jun 2024 245th elgan65536 736 110 10ms 30 Mar 2024 245th JunkIce 736 110 18ms 25 Nov 2024 245th snoozingnewt 🇨🇦 736 110 17ms 31 Mar 2025 248th kg583 🇺🇸 735 167 6ms 11 Nov 2025 249th Shanethegamer 🇺🇸 735 193 451ms 24 Sep 2025 250th sean-niemann 🇺🇸 734 165 431ms 10 Jun 2024 251st stefangimmillaro 734 172 110ms 23 Oct 2023 252nd jared-hughes 733 113 9ms 19 Jul 2022 253rd antimon2 🇯🇵 731 107 353ms 18 Aug 2022 254th lifthrasiir 🇰🇷 731 147 1ms 30 Nov 2024 255th GolfingSuccess 🇬🇷 730 213 3ms 11 Sep 2022 256th SB-945 729 111 16ms 24 Jan 2024 257th MeWhenI 🇻🇦 728 291 1,669ms 7 Nov 2025 258th rucin93 🇵🇱 727 195 478ms 24 Sep 2025 259th vlpx 🇫🇮 726 114 10ms 23 Sep 2024 260th m-tkach 🇺🇦 726 148 2ms 17 Jun 2022 260th sean-niemann 🇺🇸 726 148 2ms 10 Jun 2024 262nd blaztoma 🇱🇹 725 108 257ms 13 Oct 2025 263rd GrayJoKing 🇦🇺 725 181 380ms 24 Jul 2025 264th h3ra993huskp 🇯🇵 724 196 450ms 20 days ago 265th duckyluuk 🇳🇱 722 105 360ms 28 Aug 2024 265th KatieLG 🇬🇧 722 105 368ms 28 Oct 2024 267th GolfingSuccess 🇬🇷 721 149 2ms 10 May 2022 268th acotis 717 218 241ms 5 Jun 2025 269th dokutan 716 113 10ms 23 Jun 2024 269th RaBa21 🇭🇺 716 113 17ms 19 Jul 2025 271st UnderKoen 🇳🇱 716 177 7ms 20 Jan 2025 272nd HPWiz 🇳🇿 715 106 540ms 4 Jun 2024 272nd snoozingnewt 🇨🇦 715 106 384ms 28 Sep 2025 274th tomtheisen 🇺🇸 715 175 383ms 31 Jan 2025 275th albanian-laundromat 713 218 2ms 6 Jul 2025 276th MeWhenI 🇻🇦 711 144 2ms 23 Jun 2024 277th emplv 🇱🇻 711 150 100ms 20 Dec 2022 278th Sakisan 🇧🇪 711 175 138ms 11 May 2022 279th jmerle 🇳🇱 710 114 18ms 11 Jul 2023 280th MeWhenI 🇻🇦 710 176 413ms 23 Jun 2024 281st stefangimmillaro 710 220 232ms 23 Oct 2023 282nd andersk 🇺🇸 707 221 225ms 29 Nov 2022 283rd sean-niemann 🇺🇸 706 177 408ms 20 Jun 2025 284th Shanethegamer 🇺🇸 705 179 111ms 11 May 2022 285th Kacarott 🇦🇺 703 157 72ms 28 Oct 2023 286th neel11235813 702 108 352ms 27 Mar 2024 287th Shanethegamer 🇺🇸 702 176 448ms 12 May 2022 288th edsrzf 🇳🇿 702 205 11ms 40 hours ago 289th SirBogman 🇺🇸 698 67 3ms 9 May 2022 290th wh3n3v3r 🇨🇿 698 116 10ms 11 Nov 2024 291st jared-hughes 697 151 3ms 19 Jul 2022 292nd dokutan 696 109 381ms 23 Jun 2024 293rd YAJUE114514 695 179 161ms 15 Aug 2025 294th MeWhenI 🇻🇦 693 155 1ms 5 Jul 2024 294th Shanethegamer 🇺🇸 693 155 2ms 28 May 2025 296th Shanethegamer 🇺🇸 691 190 366ms 20 May 2022 297th JunkIce 689 110 359ms 3 Dec 2024 298th DialFrost 🇸🇬 688 127 22ms 3 hours ago 299th emgordon154 688 171 3,937ms 8 Nov 2024 300th emgordon154 687 103 128ms 6 Sep 2024 300th ovs-code 🇩🇪 687 103 136ms 17 Apr 2025 302nd Waffle3z 687 153 2ms 29 Nov 2023 303rd Shanethegamer 🇺🇸 687 182 355ms 26 Mar 2024 304th GrayJoKing 🇦🇺 686 173 39ms 29 Apr 2024 305th SirBogman 🇺🇸 685 54 52ms 16 Sep 2022 306th emplv 🇱🇻 685 138 4ms 1 Dec 2023 307th stefangimmillaro 683 183 325ms 15 Jul 2023 308th Vinterion 680 158 2ms 17 Jun 2024 309th Irratix 🇳🇱 679 209 402ms 12 May 2022 310th MeWhenI 🇻🇦 678 169 150ms 23 Jun 2024 310th Shanethegamer 🇺🇸 678 169 114ms 24 May 2025 312th m-tkach 🇺🇦 678 187 16ms 15 Jan 2025 313th MichalMarsalek 🇨🇿 677 194 521ms 5 Nov 2022 314th lynn 677 263 34ms 23 Jul 2023 315th MeWhenI 🇻🇦 675 158 104ms 23 Jun 2024 316th Shanethegamer 🇺🇸 675 213 9ms 4 Oct 2024 317th HPWiz 🇳🇿 674 120 30ms 21 May 2022 317th albanian-laundromat 674 120 17ms 12 Jul 2025 317th robin-scragg 674 120 18ms 3 Oct 2025 320th MeWhenI 🇻🇦 673 123 9ms 25 Nov 2022 First Prev 241–320 of 700 Next Last