75577

Properties

Appears in sequences

• Primes that contain digits 5 and 7 only.at n=10A020467
• Numbers k such that A111875(k) is prime and sets a new record for number of digits.at n=10A109320
• Let p be an element of A110028. Let L(p) be the sorted list of digits of p and let LL be the set of all L(p) with duplicates removed and ordered lexicographically. Then a(n) is the first element of A110028 such that L(a(n))=LL(n).at n=19A117608
• Emirps with only prime digits (i.e., 2, 3, 5, 7).at n=33A128388
• Lesser of emirps (pairs) with only prime digits (A128388).at n=18A133554
• Emirps with a prime number of only prime digits.at n=25A137833
• Lesser of emirps (pairs) with a prime number of only prime digits.at n=14A137834
• Lesser of two Pythagorean primes for which the Pythagorean triangles have the same area.at n=33A157184
• Primes that contain only the digits (2, 5, 7).at n=37A214705
• Primes having only {4, 5, 7} as digits.at n=30A217039
• Primes having only {0, 5, 7} as digits.at n=20A260827
• Primes having only {5, 6, 7} as digits.at n=25A260829
• Primes having only {5, 7, 8} as digits.at n=23A260830
• Primes having only {5, 7, 9} as digits.at n=30A260831
• a(n) is the number of distinct pairs that can be made in exactly n iterations of either of the two maps (x, y) -> (x OR (2^y), 0) or (x, y) -> (x, y+1), starting from (0,0).at n=43A353150
• Emirps p such that 2*p - reverse(p) is also an emirp.at n=37A358689
• Prime numbers followed by two consecutive numbers which are products of four distinct primes (or tetraprimes).at n=29A362578
• Prime numbersat n=7446