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A106095 Primes with maximal digit = 7. 7
7, 17, 37, 47, 67, 71, 73, 107, 127, 137, 157, 167, 173, 227, 257, 271, 277, 307, 317, 337, 347, 367, 373, 457, 467, 547, 557, 571, 577, 607, 617, 647, 673, 677, 701, 727, 733, 743, 751, 757, 761, 773, 1117, 1171, 1217, 1237, 1277, 1307, 1327, 1367 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MAPLE
Res:= 7:
A:= {7}: B:= {$1..6}:
for d from 2 to 4 do
A:= {seq(seq(10*a+i, i=0..7), a=A), seq(10*b+7, b=B)}:
B:= {seq(seq(10*b+i, i=0..6), b=B)}:
Res:= Res, op(sort(convert(select(isprime, A), list)))
od:
Res; # Robert Israel, Jan 01 2019
MATHEMATICA
Select[Prime[Range[200]], Max[IntegerDigits[ # ]]==7&]
CROSSREFS
Sequence in context: A090652 A062675 A257668 * A153319 A030432 A090147
KEYWORD
nonn,base
AUTHOR
Zak Seidov, May 07 2005
STATUS
approved

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Last modified June 12 23:15 EDT 2024. Contains 373360 sequences. (Running on oeis4.)