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]
