Revision as of 23:50, 18 September 2021 view source rosettacode>Retroburrowers m →‎{{header\|QL SuperBASIC}} ← Older edit		Revision as of 00:12, 19 September 2021 view source rosettacode>Retroburrowers m →‎Sieve of Sundaram Newer edit →
Line 1,753: just a slight transformation away from the Sieve of Sundaram, as transformed as follows: <code>O</code> is the highest value for an Index of succesive diagonal elements in Sundaram's matrix, for which H(J) also includes the off-diagonal elements in-between, such that duplicate entries are omitted. Thus, a slightly transformed Sieve of Sundaram is what Eratosthenes' Sieve becomes upon applying all optimisations incorporated into the ~~other~~prior entries for QL SuperBASIC, AND by not implementing an equivalent to line 50 in them. Backward-compatible on 1K ZX80s for all primes < 441 (O=10).<lang qbasic> 10 INPUT O

Sieve of Eratosthenes: Difference between revisions