ps Re Divisors concatenated shape a prime

[Simon Plouffe]

The number is
23637741111132222263396784181836212543250863192525397638\
    5050794957757619119155152382118123439689236246879378\
    3543703190673607553698617087406381347215107397221082\
    2661095832164532219166133479486848572669589736971440\
    0438460545718008769210914230132785470246166539693602\
    6557094049233307938690398356410738499619079180796712\
    8214769992381581114913062399108161968641222982612479\
    8216323937282334473918719732448590592334050047581378\
    1681898530966894783743946489718118466810009516275633\
    6379706181021501427441345045695592720430028548826900\
    9139118541259851760510992223024564332519703521021984\
    4460491286637795552815329766690736929975591105630659\
    5333814738598961996828961134745198615110831211923993\
    6579222694903972302216624228859904868834042355958453\
    3249363577198097376680847119169066498726355938826715\
    6198557234875910075477711877653431239711446975182015\
    0954106781648014685956717046277302264311087056416726\
    0822620744350752392673213563296029371913434092554604\
    5286221741128334521645241488701504785346326116925017\
    8246786223305225717801965223385003564935724466104514\
    3560384022108741886504369675409778385289018044217483\
    7730087393508195567705780212066326225659513109026229\
    33515586703

and divisible by 13 and 47 if I am not mistaking.

the rest (%/13/47) is not prime either but I can't determine
its factors.

simon plouffe