Primes whose first and last number is 3: Difference between revisions
Primes whose first and last number is 3 (view source)
Revision as of 19:33, 28 July 2021
, 2 years ago→{{header|Sidef}}: optimization
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Line 448:
callback(s.digits2num(base))
for k in (0 .. base**(upto.len(base) - 2*s.len)) {
break if (s + k.digits(base) + s -> digits2num(base) > upto)
Inf.times { |j|
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