is 2 216091 - 1
has 65050 decimal digits
takes 0.001 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
Verified Mersenne Prime

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual267137.506573.1343 %100003650000.00020.5226 %137.506773.2747 %
Target2440.000059.0909 %40004500000.00029.3621 %0.000262.9209 %
Difference+23+137.5065+14.0434 %+6000-85000+0.0000-8.8395 %+137.5065+10.3539 %

Known prime factors:
None — M216091 is prime!

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-01-09ANONYMOUSv4_computers100001625004--0.00011.794%
2021-04-04Mohammadaminzareiyanhome_office10000365000---13.639%


Trial Factoring results:
5758596061626364656667
No TF results for M216091


ECM factoring results:
No ECM results for M216091


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-05-13Amperiov4_computersA843319CB2E36F__0.001


PRP results:
No PRP results for M216091


CERT results:
No CERT results for M216091


P-1 factor-bounds graph:
B1 = 10000, B2 = 365000 (P-1 stage 2)
B1 = 10000, B2 = 162500 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
102
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107
TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00