New Mersenne and the largest known prime is found: 2^136279841-1

Ideas
1

A new highest prime was announced at mersenne.org , which is a Mersenne prime:

2^{136279841}-1

The beginning and end are

88169432750383326555…55076706219486871551.

This also leads to the newest known perfect number:

2^{136279840} \times(2^{136279841}-1)

The beginning and the end are

38869244357621839661…38972750732330008576

Some code for finding the ending digits:

 (PowerMod[2, 136279841, 10^80] - 1) PowerMod[2, 136279840, 10^80]
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2

See all the digits here:

https://www.wolframcloud.com/obj/arnoudbuzing/prime.txt

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3

I wonder if Mersenne is more useful than Solinas prime in cryptography or not.

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