A391722 Weakly primes (A050249) that are also non-insertable primes (A125001).

34101693667, 40144044691, 45031673353, 58058453543, 89797181359, 95815971907, 106071536707, 171199263119, 181504380313

Offset

1,1

Comments

Intersection of A050249 and A125001.

Links

Table of n, a(n) for n=1..9.

Example

34101693667 is in the list because changing one digit anywhere in another gives a composite number and prepending, inserting or appending any digit (not prepending 0) gives also a composite number.

Crossrefs

Cf. A050249, A125001.

Sequence in context: A271818 A034655 A099600 * A115498 A115502 A022262

Adjacent sequences: A391719 A391720 A391721 * A391723 A391724 A391725

Keyword

base,nonn,more,hard

Author

Emmanuel Vantieghem, Dec 18 2025

Status

approved