7 10^ sqrt >integer 1000 [ - ] [ + ] 2bi primes-between ; inline
: n-and-phi ( seq -- seq' )
- #! ( seq = { p1, p2 } -- seq' = { n, φ(n) } )
+ ! ( seq = { p1, p2 } -- seq' = { n, φ(n) } )
[ product ] [ [ 1 - ] map product ] bi 2array ;
: fit-requirements? ( seq -- ? )