prime sequences A080050/A080051
Ralf Stephan
ralf at ark.in-berlin.de
Sat Jan 25 12:16:29 CET 2003
Can someone prove there is a mapping between
%N A080050 Primes p such that 2^p-1 and the p-th Fibonacci number have a common
factor. Prime members of A074776.
and
%N A080051 Common factors of 2^p-1 and the p-th Fibonacci number, p prime.
?
Define p the former, gcd the latter numbers.
gcd = 8k(p-1)+9 ???
x is the position of the twin prime pair.
All shown gcd are prime.
Thanks,
ralf
p gcd estim.(gcd-9)/(8p) please verify
-------------------
11 89 1
8501 680081 10
10867 260809 3
13109 3146161 30
14633 1170641 10
15401 123209 1
17657 423769 3
19211 153689 1
19541 156329 1
22481 179849 1
24359 779489 4
25243 403889 2
26111 208889 1
29411 235289 1
30851 246809 1
34961 279689 1
36007 864169 3
42443 2376809 7
43331 346649 1
45523 728369 2
46187 1108489 3
46601 372809 1
47591 380729 1
50411 403289 1
57251 458009 1
58027 1392649 3
61001 488009 1
62921 503369 1
63131 505049 1
64123
70639
74293
76919
78941
81761
87583
91099
92333
94841
94903
95257
95651
101021
101203
102551
102673
108461
113933
116411
117361x
117371
121021
123551
127331
129581 1036649 1
132403 2118449 2
134951 1079609 1
136511 1092089 1
144461 1155689 1
153191 1225529 1
156371 1250969 1
157901 1263209 1
161233 6449321 5
164683 19761961
168851 1350809
174613 2793809
176537 4236889
177761 1422089
181957 4366969
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