Template:Sequence of the Day for January 9

Intended for: January 9, 2012

Timetable

• First draft entered by Alonso del Arte on November 8, 2011 ✓
• Draft to be reviewed by November 9, 2011
• Draft to be approved by December 9, 2011

Yesterday's SOTD * Tomorrow's SOTD

The line below marks the end of the <noinclude> ... </noinclude> section.

---

A073277: Irregular primes with irregularity index two.

{ 157, 353, 379, 467, 547, 587, ... }

These prime numbers are just some of the prime numbers that were such a headache for Gabriel Lamé in trying to prove Fermat’s last theorem in the 19th century.