%I #21 Aug 11 2024 14:41:32

%S 2,3,5,7,313,373,797

%N Every prefix (or suffix) of palindromic prime a(n) is prime (right/left-truncatable).

%H I. O. Angell and H. J. Godwin, <a href="http://dx.doi.org/10.1090/S0025-5718-1977-0427213-2">On Truncatable Primes</a>, Math. Comput. 31, 265-267, 1977.

%H C. K. Caldwell, <a href="https://t5k.org/glossary/page.php?sort=LeftTruncatablePrime">Left</a> and <a href="https://t5k.org/glossary/page.php?sort=RightTruncatablePrime">Right</a> truncatable primes.

%H P. De Geest, <a href="https://www.worldofnumbers.com/truncat.htm">The list of 4260 left-truncatable primes</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/PrimeString.html">Prime strings</a>

%H <a href="/index/Tri#tprime">Index entries for sequences related to truncatable primes</a>

%Y Cf. A033664, A024785, A032437, A020994, A024770, A052023, A052024, A050986, A050987.

%K nonn,base,fini,full

%O 1,1

%A _G. L. Honaker, Jr._ and _Patrick De Geest_, Nov 15 1999