251

This number is a prime.

Single Curio View: (Seek other curios for this number)

Puzzle Sequence: 7, 19, 79, 491, 2423, ? , ... . The coauthor of "Prime Curios!" estimates an IQ of 251 or greater is required to determine the next term. Email him for answer and explanation.

Submitted: 2018-03-10 19:33:58; Last Modified: 2025-04-02 04:07:30.