is 2 21055451 - 1
has 6338323 decimal digits
takes 14.922 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2671.411262.6866 %----1.411262.6866 %
Target2695.670163.7681 %150000225000001.40543.7852 %7.075565.1396 %
Difference-2-4.2589-1.0815 %-150000-22500000-1.4054-3.7852 %-5.6643-2.4530 %

Known prime factors (1 factor, 64.3 bits, 0.00030521% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
21055451221275362495744667932064.262525458615196
22 × 3 × 43788217933
2002-11-244437882179330.16902,451.54,578.8

P-1 results:
No P-1 results for M21055451


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2002-11-24ANONYMOUSv4_computers??64.26220
2003-10-31kkmrkkblmbrbkv4_computers??64.26220
2001-04-21ANONYMOUSv4_computers212560.000


ECM factoring results:
No ECM results for M21055451


Lucas-Lehmer results:
No L-L results for M21055451


PRP results:
No PRP results for M21055451


CERT results:
No CERT results for M21055451


P-1 factor-bounds graph:
100
101
100
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
256
this exponent TF target: 69
TF double-checked to: 67
250
260
270
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Last modified: 2024-02-09T03:30:02+00:00