OFFSET
1,1
LINKS
James Maynard, Primes with restricted digits, arXiv:1604.01041 [math.NT], 2016.
James Maynard and Brady Haran, Primes without a 7, Numberphile video (2019)
FORMULA
a(n) >> n^k with k = log 10/log 7 = 1.183.... - Charles R Greathouse IV, Jan 02 2013
MATHEMATICA
Select[Prime[Range[200]], Min[IntegerDigits[ # ]]>2&]
PROG
(PARI) is(p)=vecsort(digits(p), , 8)[1]>2 && isprime(p) \\ Charles R Greathouse IV, Jan 02 2013
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Zak Seidov, May 07 2005
STATUS
approved