Results

number digits date factorization method
$\bigl(7\cdot10^{275}-27\cdot10^{137}-7\bigr)\bigl/\bigr.9$ 275 Oct 6, 2017 $17783338749850324659530314136241093884108150617292028363225235667$
$5728683950135865775006065633318050252133684586325264559163920687049979848681$
P135
snfs
$\bigl(49\cdot10^{213}+41\bigr)\bigl/\bigr.9$ 214 Feb 8, 2017 $\text{P94}\cdot\text{P120}$ snfs
$\bigl(7\cdot10^{212}-277\bigr)\bigl/\bigr.9$ 212 Feb 8, 2017 $\text{P70}\cdot\text{P143}$ snfs
$\bigl(10^{186}+629\bigr)\bigl/\bigr.9$ 171 Nov 1, 2016 $19756594454463261794185050879211369844824666492884688407847121549$
P107
snfs
$\bigl(10^{205}+18\cdot10^{102}-1\bigr)\bigl/\bigr.9$ 190 Oct 31, 2016 $17655368062011612429586799534000607498665508790752438073560141899778613613$
P116
snfs
$\bigl(10^{207}+18\cdot10^{103}-1\bigr)\bigl/\bigr.9$ 188 Oct 29, 2016 $3724161603139849816143766890223038700947334723$
$3712578004916249190523260349678311450899510681449$
$1351013824005414412487323308503097892088692490791779062705509405260056382712633404788177272957$
ecm
gnfs
gnfs
$\bigl(10^{219}+18\cdot10^{109}-1\bigr)\bigl/\bigr.9$ 176 Oct 29, 2016 $109208718222097569832577072616215064030627269$
$1495517513060797746420497391344488306663601104511650508044467647$
$263634528332604085923524210607910406017958770836997732881817363737151$
p-1
gnfs
gnfs
$\bigl(10^{273}+72\cdot10^{136}-1\bigr)\bigl/9\bigr.$ 273 Sep 26, 2016 $3948668030455486680577648190829312836176810875381268954494131$
P212
ecm
$\bigl(10^{186}+29\bigr)\bigl/\bigr.3$ 151 Oct 3, 2016 $13112828835004710777383762011092960660070699835638274668631$
$106368672551071440090504914020792602573221302599899447737713949847897071552371471276764139221$
snfs
$\bigl(10^{186}+449\bigr)\bigl/\bigr.9$ 164 Oct 7, 2016 $101352994399302034756646044620801962432713950145931789343522847076508323387209261$
$125047034827048403587147203506156331624109825810141599372970768232627977303976644891$
snfs

Related Links

Numbers of the form $10^n+1$
Numbers of the form $\frac{z^{41}-1}{z-1}$
Generalized Fermat numbers
Other numbers
Aliquot sequences