is 2 30971147 - 1
has 9323245 decimal digits
takes 34.090 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LFEA219305C5A3746double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2670.959462.6866 %37500080625001.26706.1362 %2.226464.9762 %
Target27115.436264.7887 %220000325000003.15803.6882 %18.594366.0874 %
Difference-4-14.4768-2.1022 %+155000-24437500-1.8911+2.4481%-16.3679-1.1112 %

Known prime factors (1 factor, 67.5 bits, 0.00021778% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
309711472016557494830178552312167.4503255542158045
5 × 17 × 38300495977
2011-05-2217383004959771.70413,330.46,220.3

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-05-27Carsten Kossendeymother18000038250006--0.6503.196%
2009-08-01ANONYMOUSv4_computers3750008062500--1.3624.149%
2011-05-22UngelovendeManual testing2167.4501.3730.000%


Trial Factoring results:
575859606162636465666768697071
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-09-10Net_Forcev4_computers212560.000
2003-08-25AxelFoxv4_computers212600.002
2005-11-27ANONYMOUSv4_computers212670.483


ECM factoring results:
No ECM results for M30971147


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2008-08-26Freightyardv4_computersFEA219305C5A374634.09


PRP results:
No PRP results for M30971147


CERT results:
No CERT results for M30971147


P-1 factor-bounds graph:
B1 = 375000, B2 = 8062500 (P-1 stage 2)
B1 = 180000, B2 = 3825000 (P-1 stage 2)
B1 = 375000 (P-1 stage 1)
B1 = 180000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 71
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00