Prime Curios!: 202

202
(another Prime Pages' Curiosity)

Curios:

Index
Keywords
Home
Glossary
The book!
Previous
Next
Random

Curios Search:
Participate:

Mail Editor
Submit Curio
Prime Puzzio
Test Number

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

A semi-prime palindrome equal to (2 + 3 + 5 + 7)² - (2² + 3² + 5² + 7²). It's the only such case for all primes < 2,000,000,000. [Trotter and De Geest]

Submitted: 2001-12-01 14:19:39; Last Modified: 2009-05-26 14:41:24.