220897

Properties

Appears in sequences

• Primes that remain prime when a single digit 7 is inserted between any two consecutive digits or as the leading or trailing digit.at n=33A215420
• Primes 8k + 1 preceding the maximal gaps in A269424.at n=13A269425
• Primes p such that (p*s) mod q and (p*s) mod r are a pair of twin primes, where q,r,s are the next primes after p.at n=35A338751
• Prime numbersat n=19688