Sandbox scoreEPIC
8,969EP
Top 7.3552% ยท sandbox population rank
73,550 higher ยท 2 tied ยท 926,448 lower
The patterns
Matched badges / 3
Bookends
First 2 digits mirror the last 2 digits, excluding full palindromes (e.g. 421324)
+1,800 EPTwo Pair
Two distinct pairs of identical digits
+600 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.