Wagstaff prime
(another Prime Pages' Glossary entries)
The Prime Glossary
Glossary: Prime Pages: Top 5000: A Wagstaff prime is a prime of the form (2p+1)/3. The number appears in the new Mersenne conjecture and has applications in cryptography. It is named after Samuel S. Wagstaff, Jr., a professor of computer science at Purdue University.

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