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ATH · 2017-12-31, 05:00

Btw the corresponding Perfect number +1 has small factors:
2^p-1*(2^p-1)+1

and the corresponding Wagstaff number has a factor (NMC):
2^p+1 / 3

Still no factor of 2^p - 3 (twin prime)

2017-12-31, 05:00	#196
ATH Einyen Dec 2003 Denmark 110101111010₂ Posts	Btw the corresponding Perfect number +1 has small factors: 2^p-1*(2^p-1)+1 and the corresponding Wagstaff number has a factor (NMC): 2^p+1 / 3 Still no factor of 2^p - 3 (twin prime)