6 Jan
2007
6 Jan
'07
5:09 p.m.
At 07:03 PM 1/6/2007, N. J. A. Sloane wrote:
This led me to wonder about the analogous question for primes. This must be well-studied. What's the largest prime known with property that you can repeatedly delete a digit (you get to choose which digit) and still have a prime, all the way down to the empty word?
I think this is the largest known: http://primes.utm.edu/glossary/page.php?sort=DeletablePrime