A329894 Terms of A025487 from which the distance to the next larger prime is a composite number.

512, 16384, 373248, 393216, 524288, 1119744, 4194304, 4718592, 5971968, 8388608, 10077696, 10616832, 17915904, 21233664, 31104000, 33554432, 35831808, 42467328, 47775744, 56623104, 67108864, 150994944, 159252480, 286654464, 322486272, 362797056, 679477248, 859963392, 1528823808, 2176782336, 2890137600, 4294967296, 5804752896, 8748000000

Offset: 1

Author

Antti Karttunen, Dec 24 2019

Keywords

• nonn

Comments

From the first 795641 terms of A025487 (terms that are in range 1 .. 2^101) only 4238 (~ 0.5 %) are included in this sequence.

Examples

			As A151800(512) = 521, with 521 - 512 = 9 (a composite number), 512 is included in this sequence.
		

Links

• Antti Karttunen, Table of n, a(n) for n = 1..4238

Crossrefs

Cf. A025487, A129912, A141345, A151800.

Programs

PARI

isc(n) = ((n > 1)&&!isprime(n));
for(n=1,2000,if(isc(nextprime(1+A025487(n))-A025487(n)),print1(A025487(n),", ")));