is 2 1884121 - 1
has 567177 decimal digits
takes 0.102 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
Actual26715.770768.6567%500000150000000.10155.0864%15.872270.2510%1.5942%
PrimeNet2570.010263.1579%90001600000.00143.0333%0.011564.2754%1.1175%
GPU722610.163065.5738%100001500000.00141.6922%0.164466.1563%0.5826%
Difference+6+15.6077+3.0829%+490000+14850000+0.1001+3.3942%+15.7078+4.0946%+4.0946%

Known prime factors (5 factors, 271.3 bits, 0.01439809% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
188412111417773271030.089303
3 × 101
-31018.090e-116.560e-78.047e-7
1884121318454131431134.8908451
33 × 313
2008-07-15273132.222e-93.350e-64.322e-6
1884121323661502722231444.8808589191
13 × 29 × 22783
2008-08-2629227831.408e-69.980e-50.0002
18841211051997609243775571703992476.47727917464144918919
157 × 177818242961267
2021-10-0715717781824296126715,083762,0851,423,362
1884121371474230775583172959569112684.9419858024797122455855
3 × 5 × 11 × 211 × 317 × 58543 × 15257707
2020-11-1558543152577073,490,4450.06970.1221

26 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1884121363603706956252087612064.979
1884121369549365430990992879212374.968
188412110307134272673633520268892579.770
188412112011470182927485636480785374347333106.566
1884121117684522188833904241502135454570334109.859
1884121335012984918163088820845820515405734111.368
18841214241408542643264920879554974875689735115.030
1884121118297503510265714596563043432108127337119.832
1884121340491127068033719012754133944752697737121.357
1884121120231907755409708379069358421992818315340129.821
1884121382510230430151565303928922827201682466563943141.456
1884121135069407348724304671808635116897323563569727146149.920
1884121388765048930956886840251493963639700855945047946151.446
188412110843080613007244050615929481751809995220285871148156.247
1884121137278066257082266622903314806667898109239877203149159.910
1884121390790002671584056514717861960171507636018867748949161.419
18841213828834775442087956564612572800307836629665737987950164.711
188412112380383598764932543748908667295076893754500778080
4245497
57186.336
188412144619516466868410290319149658803960445021371173990
55491903
58191.508
188412143716767354289124303452354461625283864841724352233
068203433
59194.800
188412112444869087230668025963050974203305471806200111206
7988837927
60196.309
188412112648367951350917208030462144488245578257300399591
0239702088047
63206.298
188412114209269361283161971108458942090596076163357025000
8015737634126281129
69226.398
188412114441619750405916288783324001908476819262189768481
0712418979366622310369
72236.387
188412140279250299545048346171814432044994074684666918083
51465657155096477001721
73241.189
188412145989934740578494616777824964960356478324297361614
72332734558844479938141977779767
82271.277
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:39:51alpertronManual testing5000001500000012-
skipped known factor: 1141777327
skipped known factor: 31845413143
skipped known factor: 32366150272223
--0.101--5.086%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-08-26T20:20:00ANONYMOUSManual testing??44.880141.64503e-70.2183.50899e-7
2008-07-15T07:47:00J FeitsmaManual testing??34.890111.00727e-90.2182.14862e-9


ECM factoring results:

Old Calculation Method

Total ECM effort:19.802 GHz-days
Estimated T-Level:24.589
DigitsB1CurvesCompleteFacMiss
2011000257 / 1002.5707.555%
2550000257 / 2800.91839.872%

New Calculation Method

Total ECM effort:19.802 GHz-days
Estimated T-Level:24.589
DigitsB1CompleteFacMiss
20110008.7890.015%
25500000.79645.091%
302500000.04995.192%
3510000000.00299.774%


ECM Summary

B1B2factorcurvesGHz-days
500005000000281.940
50000500000050.346
50000660000019315.09
500006600000241.876
50000675000070.553


Lucas-Lehmer results:
No L-L results for M1884121


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T14:36:18Oliver KruseGTX-0
1141777327
31845413143
32366150272223
25CC82285FEFAA__no
2017-11-08T09:18:22ATHec2-1xf
1141777327
31845413143
32366150272223
25CC82285FEFAA__no
2020-11-16T19:00:07rbanovccg_lnx01
1141777327
31845413143
32366150272223
37147423077558317295956911
37AB8E111AA43A46no
2021-10-09T14:01:47JackBlockWin10
1141777327
31845413143
32366150272223
105199760924377557170399
37147423077558317295956911
37AB8E111AA43A46no


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
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
TF factor-bounds graph:
267
2
230
240
250
260
270
280
290
2100
Last modified: 2021-10-20T13:19:03+00:00