I notice that p=isprime(x) can be a lot slower than p=ismember(x,primes(max(x))); for x=1:1e7, the former takes about 100 seconds and the latter takes about 0.1 seconds.
Nice observation. I'll keep that one in mind.
Rosenbrock's Banana Function and its derivatives
Compute Khinchin's constant
List modest numbers up to n
Compute the Bernoulli numbers
Count trailing zeros in a primorial
Play Outside In with primes
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