71850239

Properties

Appears in sequences

• First member of a prime sextet: p, (p-1)/2, (p-3)/4, (p-7)/8, (p-15)/16, (p-31)/32.at n=13A066174
• Least prime that ends a complete Cunningham chain (of the first kind) of length n.at n=6A110056
• a(0)=1, followed by highly safe primes: positions of records in A292936.at n=7A292937
• Prime numbersat n=4220407