is 2 1969819 - 1
has 592975 decimal digits
takes 0.130 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
Actual26715.084668.6567%500000150000000.12305.1137%15.207670.2595%1.6028%
PrimeNet2580.019563.7931%80001400000.00142.4716%0.020964.6880%0.8949%
GPU722620.311966.1290%80001000000.00121.1959%0.313166.5341%0.4051%
Difference+5+14.7727+2.5277%+492000+14900000+0.1217+3.9178%+14.8945+3.7254%+3.7254%

Known prime factors (4 factors, 251.0 bits, 0.01274019% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
196981914135520777445031650.328358802529
3 × 29 × 4124167
-2941241670.00010.02140.0400
1969819156924716678380391753.8013983226801
3 × 1327742267
2014-10-13313277422670.00086.896612.881
1969819967847332555194436812066.39124566910273360
24 × 34 × 5 × 7 × 13 × 31 × 1343917
2015-09-298113439178.87690.00700.0130
196981916378965549538401348931432580.438415747983686277809
7 × 223 × 5464489 × 48739121
2021-11-15546448948739121234,8690.74571.0603

11 Composite Factors:
exponentprime factorscomposite factordigitsbits*
19698192218212593101920636217742654961732104.129
196981913681026078728700559209606781583554336116.720
1969819151879168449150092240441694528998155937120.192
1969819231525207838556426065696130265636064292940130.766
19698192570264528346266600067506583288509566657741134.239
196981915852338117134166130914850468832489574157938345146.830
196981921468911412740347831911553182215044290353751836201
77
52170.521
196981936332027643968601798685327935687050419614070209482
576231
56184.567
196981922408105482583383107238478877327088321228994195432
1566381649
60197.158
196981924876236677211690683039730322188125958359625288612
18905549937
61200.630
196981935163856041536596768586494819044032977236890180036
10039316544332407793746311
76250.959
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-09-29T01:17:26alpertronManual testing50000015000000122066.3910.1230.2590.2465.114%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2014-10-13T11:49:00TJAOIManual testing253254*53.801170.0000.2810.000


ECM factoring results:

Old Calculation Method

Total ECM effort:3.385 GHz-days
Estimated T-Level:1.900
DigitsB1CurvesCompleteFacMiss
201100038 / 1000.38068.255%
255000038 / 2800.13687.288%

New Calculation Method

Total ECM effort:3.385 GHz-days
Estimated T-Level:1.900
DigitsB1CompleteFacMiss
20110001.26628.208%
25500000.11489.208%
302500000.00799.297%


ECM Summary

B1B2factorcurvesGHz-days
500005000000201.689
50000500000040.338
50000670000070.672
50000700000070.686


Lucas-Lehmer results:
No L-L results for M1969819


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T10:17:06Oliver KruseGTX-0
1413552077744503
15692471667838039
96784733255519443681
731EC023FE9057A8no
2017-10-05T21:08:06Oliver KruseManual testing
1413552077744503
15692471667838039
96784733255519443681
731EC023FE9057__no
2017-11-15T20:40:01kkmrkkblmbrbkc4.xlarge
1413552077744503
15692471667838039
96784733255519443681
731EC023FE9057__no
2021-11-15T09:15:34MarkSdesktop-i7
1413552077744503
15692471667838039
96784733255519443681
1637896554953840134893143
D1D88DB11DB2E30Cno


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
254
250
260
270
280
290
2100
Last modified: 2022-02-13T07:25:45+00:00