In fact larger primes were discovered (though without proofs provided) in 1851 (999,999,000,001) and 1855 (67,280,421,310,721) and 3,203,431,780,337 was proven to be prime in 1867.
In fact larger primes were discovered (though without proofs provided) in 1851 (999,999,000,001) and 1855 (67,280,421,310,721). Furthermore, 3,203,431,780,337 was proven to be prime in 1867.