Let $k={\rm ord}_p\ 2$ be the multiplicative order of 2 modulo p. Can the ratio $\frac{p-1}{k}$ be arbitrarily large if $p$ is a Wieferich prime? This is known to be true without the Wieferich restriction (related post) using Chebotarev's density theorem, but what happens if you introduce the restriction that $p$ is a Wieferich prime? Of greater interest to me is to know whether $p=O(k^t)$ for some fixed positive integer $t$ or not.
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4Given that we only know two Wieferich primes, the answer is likely to be unknown. – Wojowu Nov 22 '18 at 19:08