How far was base $47$ checked for a generalized Wieferich-prime?

Question

This question is closely related to :

Wieferich primes in base $47$

but I would like to know the current search limit for this base.

Upto which prime $p$ was $$47^{p-1}\equiv 1\mod p^2$$ verified ?

Wikipedia only says that no solution is known, but for this particular base I could not find a search limit.

Answer 1

The link posted in the comments suggests the following (translated from German):

• The bases that have a maximum prime divisor up to $61$ are verified until $9.8 \times 10^{13}$,
• The bases that have a maximum prime divisor from $67$ up to $149$ are verified until $6.01 \times 10^{13}$,
• The rest is verified until $1.202\times10^{13}$.

So it seems that the answer to your question is

Up to $9.8 \times 10^{13}$.