is 27158721-1
has 2,154,990 decimal digits
takes 1.561 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L116E42D52C2CD39Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2630.222963.4921%135,0002,936,2500.09095.5969%0.313969.0890%5.5969%
PrimeNet2630.222963.4921%30,000800,0000.02273.3255%0.245766.8176%3.3255%
GPU722674.150765.6716%45,0001,000,0000.03072.3083%4.181467.9799%2.3083%
Difference-4-3.9278-2.1796%+90,000+1,936,250+0.0603+3.2886%-3.8675+1.1090%+1.1090%

Known prime factors (2 factors, 184.4 bits, 0.00257595% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
7158721625371945348625768572065.7614367902767468
22 × 3 × 88819 × 4098131
88,8194,098,1312012-04-041.49090.09710.1319
715872151930257467107864427868475228819580736118.64436270625344323283745705744943
19 × 131 × 1031 × 1549 × 3259 × 15973 × 98887 × 1772597
98,8871,772,5972011-12-232.450e+100.06010.0636

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
715872132475726134660244623560881289288231739964694435402
638599
56184.405
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-16T00:00:00WillametteMathv4_computers30,000105,000---0.011--1.853%
2002-06-29T00:00:00Team Prime Ribv4_computers40,000600,000---0.022--3.282%
2011-12-23T04:04:00James Heinrich3930K135,0002,936,25036118.6440.0913.1220.1825.597%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2012-04-04T12:21:00BdotManual testing??65.761200.4723.1720.959
1998-08-09T00:00:00Mark Dv4_computers?261--0.021--
1998-08-09T00:00:00ANONYMOUSv4_computers?262--0.043--
2004-03-26T00:00:00Sturle Sundev4_computers?263--0.137--


ECM factoring results:
Exponent "7158721" not found


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-16T00:00:00ANONYMOUSv4_computers116E42D52C2CD39C1.561
2001-12-01T00:00:00ANONYMOUSv4_computers116E42D52C2CD39C1.561
2002-07-06T00:00:00Team Prime Ribv4_computers116E42D52C2CD39C1.561


PRP results:
dateuseridcompidcofactorsres64PRP
2018-02-10T14:18:26kkmrkkblmbrbkc5.large
62537194534862576857
519302574671078644278684752288195807
606BDB2F40BDDC__no
2019-03-27T08:08:01ATHec2-PRPCFDC
62537194534862576857
519302574671078644278684752288195807
606BDB2F40BDDC1Eno


P-1 factor-bounds graph:
B1 = 135,000, B2 = 2,936,250 (stage 2)
B1 = 135,000 (stage 1)
B1 = 40,000, B2 = 600,000 (stage 2)
B1 = 40,000 (stage 1)
B1 = 30,000, B2 = 105,000 (stage 2)
B1 = 30,000 (stage 1)
103
104
105
106
103
104
105
106
107
TF factor-bounds graph:
263
262
261
2
250
260
270
280
290
2100
2110
2120
Last modified: 2019-03-27T08:08:01+00:00