is 2 1966831 - 1
has 592076 decimal digits
takes 0.129 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
Actual26715.107568.6567%500000196403361010.246810.0566%25.354371.8088%3.1521%
PrimeNet2580.019563.7931%80001400000.00142.4709%0.021064.6877%0.8946%
GPU722620.312466.1290%80001000000.00121.1955%0.313666.5340%0.4049%
Difference+5+14.7951+2.5277%+492000+1963933610+10.2455+8.8612%+25.0407+5.2748%+5.2748%

Known prime factors (3 factors, 150.5 bits, 0.00765401% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1966831183347985831134.0944661
59 × 79
-59791.174e-95.729e-61.145e-5
19668317585211044802331549.430192828236
22 × 48207059
2008-08-264482070596.533e-50.25040.4677
19668311493553133601489920792167.01737968517213769
19 × 113 × 17684451427
2021-01-211131768445142718.36191.857171.56

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1966831139073316715997709599098392683.524
1966831273839958775918070863892742405731101.111
196683111328915724993151327713476612907440736116.447
1966831207713387981530848648065619632338983256516528146150.541
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-04-12T02:29:06Lisander ViaeneDesktop5000001964033610-
skipped known factor: 18334798583
skipped known factor: 758521104480233
--10.25--10.057%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-08-26T20:20:00ANONYMOUSManual testing??49.430152.72027e-50.2825.93669e-5


ECM factoring results:

Old Calculation Method

Total ECM effort:3.937 GHz-days
Estimated T-Level:2.250
DigitsB1CurvesCompleteFacMiss
201100045 / 1000.45063.619%
255000045 / 2800.16185.129%

New Calculation Method

Total ECM effort:3.937 GHz-days
Estimated T-Level:2.250
DigitsB1CompleteFacMiss
20110001.48522.657%
25500000.13487.465%
302500000.00899.177%


ECM Summary

B1B2factorcurvesGHz-days
500005000000342.870
50000675000040.385
50000690000070.681


Lucas-Lehmer results:
No L-L results for M1966831


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T09:49:36Oliver KruseGTX-3
18334798583
758521104480233
AB1A4A28832493__no
2017-11-12T05:01:58kkmrkkblmbrbkold
18334798583
758521104480233
AB1A4A28832493__no
2021-01-23T16:20:43marcomichsisg6
18334798583
758521104480233
149355313360148992079
8BB6E4F9846F9F__no
2021-01-24T04:35:09Oliver KruseIOS-5
18334798583
758521104480233
149355313360148992079
8BB6E4F9846F9F88no


P-1 factor-bounds graph:
B1 = 500000, B2 = 1964033610 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
267
2
230
240
250
260
270
280
290
2100
Last modified: 2022-05-23T01:20:48+00:00