A132394 - OEIS

A132394

Left-truncatable primes in the order generated (with no zero digits).

2, 3, 5, 7, 13, 23, 43, 53, 73, 83, 17, 37, 47, 67, 97, 113, 313, 613, 223, 523, 823, 443, 643, 743, 353, 653, 853, 953, 173, 373, 673, 773, 283, 383, 683, 883, 983, 317, 617, 137, 337, 937, 347, 547, 647, 947, 167, 367, 467, 967, 197, 397, 797, 997, 2113

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OFFSET

1,1

COMMENTS

The most logical way of generating the Left-truncatable primes generates them in this order. Last term is a(4260)=357686312646216567629137.

LINKS

H. J. Smith, Table of n, a(n) for n = 1..4260 (full sequence)

I. O. Angell and H. J. Godwin, On Truncatable Primes, Math. Comput. 31, 265-267, 1977.

H. J. Smith, Link to program to generate this sequence and its output file.

Index entries for sequences related to truncatable primes

PROG

(PARI) {fileO="b132394.txt"; v=vector(4260); v[1]=2; v[2]=3; v[3]=5; v[4]=7; i=0; j=4; write(fileO, "1 2"); write(fileO, "2 3"); write(fileO, "3 5"); write(fileO, "4 7"); until(i>=j, i++; p=v[i]; P10=10^(1+log(p)\log(10)); for(k=1, 9, z=k*P10+p; if(isprime(z), j++; v[j]=z; write(fileO, j, " ", z); ))); } \\ Harry J. Smith, Sep 18 2008

CROSSREFS

Cf. A024785.

Sequence in context: A233862 A235394 A126092 * A295262 A006992 A185231

Adjacent sequences: A132391 A132392 A132393 * A132395 A132396 A132397

KEYWORD

base,fini,full,nonn

AUTHOR

Harry J. Smith, Nov 11 2007

EXTENSIONS

Edited by Jason G. Wurtzel, Oct 06 2010

STATUS

approved