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Initial data commit

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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Successive-prime-differences/Factor/successive-prime-differences.factor Normal file
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USING: formatting fry grouping kernel math math.primes
math.statistics sequences ;
IN: rosetta-code.successive-prime-differences
: seq-diff ( seq diffs -- seq' quot )
dup [ length 1 + <clumps> ] dip '[ differences _ sequence= ]
; inline
: show ( seq diffs -- )
[ "...for differences %u:\n" printf ] keep seq-diff
[ find nip { } like ]
[ find-last nip { } like ]
[ count ] 2tri
"First group: %u\nLast group: %u\nCount: %d\n\n" printf ;
: successive-prime-differences ( -- )
"Groups of successive primes up to one million...\n" printf
1,000,000 primes-upto {
{ 2 }
{ 1 }
{ 2 2 }
{ 2 4 }
{ 4 2 }
{ 6 4 2 }
} [ show ] with each ;
MAIN: successive-prime-differences