A368044 -id:A368044 - 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.

A368035 Pandigital primes that are the concatenation of 8 primes.

Original entry on oeis.org

1032341589677, 1032341758967, 1032343678957, 1032343758967, 1032343767589, 1032347617589, 1032347675897, 1032347789567, 1032347896157, 1032354161897, 1032354178967, 1032354189761, 1032354361789, 1032354378967, 1032354389767, 1032354761897, 1032354767897, 1032356174189, 1032356747897, 1032356778941

Offset: 1

Eric Angelini and Giorgos Kalogeropoulos, Dec 08 2023

The least prime number that can be cut into 8 prime-chunks has at least 13 digits. There are in total 875653 such 13-digit primes.

			a(1) = 1032341589677 can be cut into the 8 prime-chunks 103,2,3,41,5,89,67,7;
a(2) = 1032341758967 can be cut into the 8 prime-chunks 103,2,3,41,7,5,89,67; etc.

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

Cf. A368034, A368044, A050288.

cp's OEIS Frontend

A368034 Pandigital primes that are the concatenation of 7 primes.

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