near-repunit prime
(another Prime Pages' Glossary entries)
The Prime Glossary
Glossary: Prime Pages: Top 5000:
GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

A near-repunit prime is a prime all but one of whose digits are 1. E.g., 1171 and 11111111113.

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