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petrw1 · 2008-05-27, 16:07

6 (7)
29 (29)
33550336 (33550337)
are Prime

496 (497)
8128 (8129)
8589869056 (8589869057)
are Composite

That is as far as I checked

2008-05-27, 16:07	#4
petrw1 1976 Toyota Corona years forever! "Wayne" Nov 2006 Saskatchewan, Canada 2²·17·67 Posts	yes 6 (7) 29 (29) 33550336 (33550337) are Prime 496 (497) 8128 (8129) 8589869056 (8589869057) are Composite That is as far as I checked