Sandbox scoreEPIC
17,661EP
Top 5.3714% ยท sandbox population rank
53,681 higher ยท 33 tied ยท 946,286 lower
The patterns
Matched badges / 3
Bookends
First 2 digits mirror the last 2 digits, excluding full palindromes (e.g. 421324)
+1,800 EPQuad Squad
The largest repeated digit group has exactly 4 digits (e.g. 333391)
+9,000 EPPrime Enigma
The numeric value is prime; leading zeros are allowed
+3,800 EPScores use independent sandbox rules at ร1. Top / Bottom percentages include tied scores across all 1,000,000 inputs; they are not official or lock-conditioned odds.
The possibilities
Best single-digit edits
All 54 changes checked. Follow a number to compare.
Keep exploring
Full archiveMathematical landmarks, familiar patterns, and surprising combinations.