Be careful, I've implemented the sieve, but not all versions of it are sufficiently fast to handle the biggest numbers in the test suite.
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This doesn't use primes(x),but still feels a little like cheating.
The whole point of using the sieve is not knowing which numbers are prime. So it is no different than sum(primes).
How to add?
Circular Primes (based on Project Euler, problem 35)
Fibonacci-Sum of Squares
Sum of series I
Clear all empty variables from the workspace
Pandigital number n°1 (Inspired by Project Euler 32)
How to reverse spdiags?
Pandigital number n°3 (Inspired by Project Euler 32)
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