is 2 7853249 - 1
has 2364064 decimal digits
takes 1.797 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 L-L tests remaining
ResidueStatus
L-L9A6E274CAA6A2E44double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2673.783665.6716%1000000100000000.49455.9347%4.278167.7089%4.2169%
PrimeNet2630.203263.4921%340009000000.02693.5558%0.230264.7902%1.2981%
GPU722673.783665.6716%5500012000000.03892.5593%3.822666.5502%0.8786%
Difference---+945000+8800000+0.4555+3.3755%+0.4555+1.1587%+1.1587%

Known prime factors (2 factors, 146.0 bits, 0.00185935% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
78532491335087459765194897112166.8558500223663895
3 × 5 × 89 × 6367208737		2020-11-038963672087373.6415115.10214.97
78532496772901965476085032275512479.16443121655543304975
52 × 7 × 13 × 312 × 10567 × 1866547		2012-09-0910567186654716,1810.03710.0630

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
78532499042416480326162113617233292266759903622776144146.020
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-05-11T00:00:00ANONYMOUSv4_computers40000560000---0.023--1.965%
2012-09-09T15:47:00nextPrimealpha_2771000000100000002479.1640.4943.5940.9895.935%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-10-11T00:00:00ANONYMOUSv4_computers?262--0.039--
1998-10-29T00:00:00ANONYMOUSv4_computers?263--0.125--
2002-08-24T00:00:00ANONYMOUSv4_computers?263--0.125--
2020-11-03T10:10:32TJAOIManual testing26626766.855211.7613.6523.579


ECM factoring results:
Exponent "7853249" not found


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-12-23T00:00:00ANONYMOUSv4_computers9A6E274CAA6A2E441.797
2002-05-25T00:00:00ANONYMOUSv4_computers9A6E274CAA6A2E441.797


PRP results:
dateuseridcompidcofactorsres64PRP
2018-05-22T02:57:38ATHec2-PRPCF
677290196547608503227551
73AAC899B6C11C__no
2019-10-26T06:41:06marssystemssystem11
677290196547608503227551
73AAC899B6C11C12no
2020-11-04T09:35:11Oliver KruseIOS-5
133508745976519489711
677290196547608503227551
73AAC899B6C11C12no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 10000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 40000, B2 = 560000 (P-1 stage 2)
B1 = 40000 (P-1 stage 1)
100
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104
105
106
100
101
102
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105
106
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109
1010
TF factor-bounds graph:
267
263
262
250
260
270
280
290
2100
Last modified: 2020-11-04T09:35:11+00:00