A060825 Smallest n-digit left truncatable prime of Henry VIII type.

773, 3373, 15647, 121997, 1237547, 12184967, 126934673, 1231633967, 12181833347, 124627266947, 1213536676883, 13264242313613, 129456645661613, 1399335756373613, 12429121339693967, 198615345451813613, 1276812967623946997, 36484957213536676883, 315396334245663786197, 9918918997653319693967, 95918918997653319693967, 357686312646216567629137

Offset

3,1

References

S. Kahan and S. Weintraub, Left truncatable primes. Journal of Recreational Mathematics, vol. 29, no. 4 (1998), pp. 255-261.

Links

Table of n, a(n) for n=3..24.

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

C. K. Caldwell, Left truncatable primes

P. De Geest, The 4260 left-truncatable primes

Index entries for sequences related to truncatable primes

Example

The 11-digit prime a(11) = 12181833347 is the smallest of its kind such that successive deleting of the leftmost digits produces the primes 2181833347, 181833347, 81833347, 1833347, 833347, 33347, 3347, 347, 47, 7.

Crossrefs

Cf. A024785, A052023, A052025, A055521.

Sequence in context: A133964 A033919 A055521 * A255156 A365597 A233991

Adjacent sequences: A060822 A060823 A060824 * A060826 A060827 A060828

Keyword

nonn,base,fini,full

Author

Lekraj Beedassy, Apr 30 2001

Extensions

a(2) removed, offset changed to 3 and a(19)-a(24) added using A055521 by Jinyuan Wang, Aug 07 2020

Status

approved