Modifications of the Eratosthenes sieve
Colloquium Mathematicum 135 (2014), 127-138 MSC: Primary 11A41; Secondary 11N32, 11N36. DOI: 10.4064/cm135-1-10
We discuss some cancellation algorithms such that the first non-cancelled number is a prime number $p$ or a number of some specific type. We investigate which numbers in the interval $(p, 2p)$ are non-cancelled.