A368035 -id:A368035 - cp's OEIS frontend

A368034 Pandigital primes that are the concatenation of 7 primes.

23401589677, 23401675789, 23401675897, 23401756789, 23401767589, 23401896757, 23415780961, 23415809761, 23415896017, 23415897601, 23416017589, 23416075789, 23417809561, 23418095761, 23475601789, 23475809761, 23476018957, 23540176789, 23540178967, 23541601789

Offset: 1

Eric Angelini and Giorgos Kalogeropoulos, Dec 08 2023

To be prime, a pandigital must use at least 11 digits. There are 4397 pandigital primes with 11 digits that can be cut into 7 prime-chunks.

			a(1) = 23401589677 can be cut into the 7 prime-chunks 2,3,401,5,89,67,7;
a(2) = 23401675789 can be cut into the 7 prime-chunks 2,3,401,67,5,7,89; etc.

Éric Angelini, Six prime chunks, Personal blog, December 2023.

Cf. A368035, A368044, A050288.

A368044 Pandigital primes that are the concatenation of 9 primes.

Original entry on oeis.org

103132343589761, 103132343675897, 103132343761589, 103132343789561, 103132343895677, 103132343895767, 103132357614389, 103132357674389, 103132357894361, 103132361743589, 103132367743589, 103132367754389, 103132367894357, 103132367895743, 103132374358961, 103132375674389

Offset: 1

Eric Angelini and Giorgos Kalogeropoulos, Dec 09 2023

The least prime number that can be cut into 9 prime-chunks has at least 15 digits. There are 3764 sets of 9 prime-chunks that produce in total 69061759 primes with 15 digits.

			a(1) = 103132343589761 can be cut into the 9 prime-chunks 103, 13, 2, 3, 43, 5, 89, 7, 61;
a(2) = 103132343675897 can be cut into the 9 prime-chunks 103, 13, 2, 3, 43, 67, 5, 89, 7; etc.

Éric Angelini, Six prime chunks, Personal blog, December 2023.

Cf. A368034, A368035, A050288.

cp's OEIS Frontend

A368034 Pandigital primes that are the concatenation of 7 primes.

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