38171953

Appears in sequences

• Fermat pseudoprimes to base 2 that can be written as 2*p^2 - p, where p is also a Fermat pseudoprime to base 2.at n=4A215343
• Fermat pseudoprimes to base 2 that can be written as p^2*n - p*n + p, where p is also a Fermat pseudoprime to base 2 and n is a positive integer.at n=15A217835