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 561st Shanethegamer 🇺🇸 554 283 220ms 11 May 2022 562nd yzhs 🇩🇪 552 201 17ms 5 Jun 2022 563rd olivermrose 🇺🇸 550 137 33ms 9 May 2022 564th madeforlosers 550 151 9ms 23 Oct 2024 565th jacobly0 🇺🇸 550 192 2ms 13 Sep 2023 566th albanian-laundromat 549 182 867ms 22 Sep 2025 567th MeWhenI 🇻🇦 547 218 39ms 23 Jun 2024 568th bac0id 547 260 422ms 29 Jun 2024 569th varhammer 🇷🇺 547 288 6ms 13 Dec 2023 570th MeWhenI 🇻🇦 546 117 16ms 23 Jun 2024 571st Alessandro-Balconi 🇮🇹 546 183 114ms 15 May 2023 572nd weliveinhell 🇭🇹 546 199 2ms 21 May 2024 573rd levikeck 545 229 145ms 5 Feb 2024 574th Bubbler-4 544 87 18ms 9 May 2022 575th MeWhenI 🇻🇦 543 115 2ms 11 Nov 2022 576th Haksell 🇦🇶 542 139 36ms 23 Feb 2023 577th adamnielson42 🇺🇸 542 205 10ms 14 Apr 2023 578th KatieLG 🇬🇧 541 232 390ms 13 Oct 2024 579th dokutan 540 219 272ms 24 Mar 2025 580th Yewzir 🇧🇪 539 191 2ms 7 May 2024 581st alexeldridge 539 206 16ms 8 Aug 2024 582nd eiburns 536 207 16ms 26 Oct 2023 583rd brimstonetrader 536 233 143ms 20 Mar 2024 584th adoxography 534 141 36ms 2 Mar 2024 585th yuchuehw 534 208 17ms 25 Feb 2024 586th scpchicken 🇵🇼 532 136 167ms 8 May 2022 587th HumanoidCPU 531 142 54ms 7 Aug 2024 588th Babafaba 531 209 16ms 27 days ago 589th HumanoidCPU 531 248 339ms 8 Aug 2024 590th emgordon154 530 205 2ms 28 Dec 2024 591st helbling 🇨🇭 529 157 13ms 3 Oct 2024 592nd dokutan 529 316 41ms 27 Aug 2024 593rd albanian-laundromat 527 296 2ms 29 Aug 2025 594th emgordon154 526 76 48ms 11 days ago 595th janbehrens 🇩🇪 526 126 3ms 22 May 2022 596th The3gs 521 301 182ms 28 Nov 2024 597th Yewzir 🇧🇪 520 209 2ms 10 Jun 2024 598th yzhs 🇩🇪 520 241 352ms 5 Jun 2022 599th msbranicky 517 199 2ms 13 Oct 2023 600th error256 516 215 73ms 21 May 2025 601st dokutan 513 290 12ms 14 May 2024 602nd msbranicky 513 304 2ms 12 Aug 2023 603rd scpchicken 🇵🇼 510 130 5ms 29 Dec 2022 604th MeWhenI 🇻🇦 507 309 222ms 25 May 2022 605th msbranicky 506 194 566ms 17 Jan 2024 606th adriweb 🇫🇷 506 209 2ms 29 Aug 2023 607th Jacob385 506 281 397ms 1 Feb 2025 608th dillon-duncando 505 220 11ms 3 Oct 2022 609th IISResetMe 501 162 257ms 24 days ago 610th Shanethegamer 🇺🇸 500 349 68ms 20 May 2022 611th Shanethegamer 🇺🇸 499 133 3ms 12 May 2022 611th MeWhenI 🇻🇦 499 133 5ms 16 Apr 2023 613th HumanoidCPU 497 238 3,900ms 26 Oct 2024 614th Natanaelel 🇸🇪 492 147 212ms 13 Nov 2022 615th janbehrens 🇩🇪 491 130 11ms 3 Jul 2023 616th TheZwierzLF 🇵🇱 489 154 34ms 5 days ago 617th Shanethegamer 🇺🇸 489 216 2ms 20 May 2022 618th MeWhenI 🇻🇦 488 227 79ms 6 Nov 2023 619th bakkeby 488 244 6ms 28 Sep 2022 620th MeWhenI 🇻🇦 483 315 116ms 23 Jun 2024 621st MeWhenI 🇻🇦 482 256 4ms 6 Aug 2023 622nd cingulataluke 481 231 10ms 27 Aug 2023 623rd MeWhenI 🇻🇦 481 265 15ms 26 Aug 2023 624th Lv0Sys 🇵🇱 478 174 10ms 14 days ago 625th MeWhenI 🇻🇦 474 301 1,316ms 25 May 2022 626th Babafaba 470 209 537ms 30 Oct 2025 627th acollett89 469 177 10ms 4 Aug 2025 628th NoneTheFewer 465 239 10ms 18 May 2024 629th GolfingSuccess 🇬🇷 460 241 71ms 19 Sep 2023 630th MeWhenI 🇻🇦 455 253 588ms 11 May 2022 631st BambooleanLogic 🇸🇪 454 183 10ms 15 Nov 2022 632nd dokutan 452 191 390ms 15 Feb 2024 633rd MeWhenI 🇻🇦 452 567 15ms 15 Nov 2023 634th frankgraziano 447 143 16ms 7 Mar 2025 635th KatieLG 🇬🇧 446 169 41ms 18 Aug 2025 636th jerrandolph 439 269 263ms 1 Oct 2025 637th 0dyse 435 250 2ms 12 May 2025 638th AtengChen 435 255 11ms 24 Aug 2024 639th roguh 🇬🇹 429 246 2ms 18 Oct 2024 640th mathisfun271 429 259 12ms 4 Feb 2024 First Prev 561–640 of 706 Next Last