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.
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).
Remove the vowels
Prime factor digits
Solve the Sudoku Row
Back to basics 11 - Max Integer
02 - Vector Variables 2
Two functions (to be sure)
Mysterious digits operation (easy)
Replicate elements in vectors
How many monitors are connected ?
I want to know everything!
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