is 2 20489647 - 1
has 6167999 decimal digits
takes 14.521 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
Actual2671.450262.6866%----1.450262.6866%
Target2695.826763.7681%15000045000000.39773.7711%6.224465.1345%
Difference-2-4.3765-1.0815%-150000-4500000-0.3977-3.7711%-4.7742-2.4479%

Known prime factors (1 factor, 39.2 bits, 0.00019129% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
204896476287862871371239.19415344
24 × 7 × 137		-161374.722e-92.322e-53.346e-5

P-1 results:
No P-1 results for M20489647


Trial Factoring results:
No TF results for M20489647


ECM factoring results:
No ECM results for M20489647


Lucas-Lehmer results:
No L-L results for M20489647


PRP results:
No PRP results for M20489647


P-1 factor-bounds graph:
100
101
102
100
101
102
103
TF factor-bounds graph:
this exponent TF target: 69
TF double-checked to: 67.8
250
260
270
Last modified: 2023-04-26T21:34:10+00:00