oh by the gods, no, please do not implement such a thing.
I rather see the current tools "Recent Significant Primes" updated!
Also you can see the newest primes on the bottom of the homepage.
Forgive my language, but a prime-counter on top of the homepage is 1 of the worst things to want. (it is like those visitor counters, which nobody is interested in, because the number itself is useless and insignificant).
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