is 2 1675951 - 1
has 504512 decimal digits
takes 0.079 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.729668.6567%500000150000000.08805.0151%17.817670.2286%1.5719%
PrimeNet2570.011563.1579%70001200000.00092.5713%0.012464.1052%0.9473%
GPU722610.183365.5738%7000900000.00081.2548%0.184166.0057%0.4320%
Difference+6+17.5463+3.0829%+493000+14910000+0.0872+3.7604%+17.6335+4.2229%+4.2229%

Known prime factors (3 factors, 192.3 bits, 0.01147696% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
16759512433705865181271547.79072606713
72606713
-1726067131.945e-50.26990.5042
1675951762544037232383280972066.04722749592238448
24 × 3 × 17 × 151 × 184631803
2019-03-2415118463180310.2940.68651.2821
16759514305562813030590137879032478.511128451333393118001
7 × 3208013 × 5720111011
2020-01-203208013572011101147,76121.47439.721

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
16759511855807895871455916453746006391431935113.838
167595110478473470978915014085409045804281768139126.301
16759513283181250005963221145133359059763668361059144144.558
167595179902974645926862414637840252478760492009878294454
30683057
58192.348
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:18:15alpertronManual testing5000001500000012---0.088--5.015%


Trial Factoring results:
No TF results for M1675951


ECM factoring results:

Old Calculation Method

Total ECM effort:15.075 GHz-days
Estimated T-Level:24.536
DigitsB1CurvesCompleteFacMiss
2011000254 / 1002.5407.786%
2550000254 / 2800.90740.302%

New Calculation Method

Total ECM effort:15.075 GHz-days
Estimated T-Level:24.536
DigitsB1CompleteFacMiss
20110008.1940.028%
25500000.74147.686%
302500000.04695.542%
3510000000.00299.791%


ECM Summary

B1B2factorcurvesGHz-days
500005000000754.451
50000500000010.059
50000500000017810.56


Lucas-Lehmer results:
No L-L results for M1675951


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:23:25alpertronManual testing
243370586518127
B6DA6BDAF6D975__no
2017-10-18T13:11:57Oliver KruseGTX-2
243370586518127
B6DA6BDAF6D975__no
2019-03-25T16:20:23EthanDLexxBuntu
243370586518127
76254403723238328097
7F2CB62CCED3F97Fno
2019-03-26T13:24:00kkmrkkblmbrbkc5.large
243370586518127
76254403723238328097
7F2CB62CCED3F97Fno
2020-01-23T13:18:32Jinyuan WangManual testing
243370586518127
76254403723238328097
430556281303059013787903
7F2CB62CCED3F97Fno
2020-01-23T21:14:47Luigi Morelli9800X
243370586518127
76254403723238328097
430556281303059013787903
7F2CB62CCED3F97Fno


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2020-01-23T21:14:47+00:00