A090721 - OEIS

A090721

Primes whose representation in base 1024 can be interpreted as a decimal prime.

2, 3, 5, 7, 1031, 1033, 3079, 4099, 6151, 7177, 1048583, 1049603, 1050631, 1051649, 1053697, 1054723, 2099203, 2100227, 2101249, 2102273, 2102279, 2105347, 3148801, 3148807, 3149831, 3150857, 3151879, 3153923, 3153929, 4198409, 4200451, 5242883

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

PROG

(PARI) is(n)=if(!isprime(n), return(0)); my(s, t, b=1); while(n, t=n%1024; if(t>9, return(0)); s+=t*b; b*=10; n>>=10); s \\ Charles R Greathouse IV, Feb 07 2013

(PARI) v=List(); forprime(p=2, 1e3, d=digits(p); t=sum(i=1, #d, d[i]<<(10*(#d-i))); if(ispseudoprime(t), listput(v, t))); Vec(v) \\ Charles R Greathouse IV, Feb 07 2013

CROSSREFS

Cf. A089971, A089981, A090707 - A090720, A065720 - A065727.

Sequence in context: A046479 A109208 A050665 * A224164 A224398 A066306

Adjacent sequences: A090718 A090719 A090720 * A090722 A090723 A090724

KEYWORD

base,nonn

AUTHOR

Cino Hilliard, Jan 18 2004

EXTENSIONS

Better definition and offset by Omar E. Pol, Dec 24 2008

a(16) and a(26) corrected by Charles R Greathouse IV, Feb 07 2013

STATUS

approved