The sieve bit vector deals with numbers in chunks of 30. Therefore, the number 90 (say) is the 91st 'element' of the vector. Each byte deals with some range {0,1,...,29}+30n so to have the number 90, you need four bytes. Rather pleasingly, I bumped into this bug and it reduced to the incantation: 2010 2010 sieve marked-prime? |
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authors.txt | ||
erato-docs.factor | ||
erato-tests.factor | ||
erato.factor | ||
summary.txt |