Ohio
Minnesota is the state.
I assume you mean twin prime. It is currently unknown whether or not there are an infinite number of twin primes in which case there would be no largest twin prime. The largest discovered is 65516468355 · 2333333 ± 1 (so the bigger of the two is 65516468355 · 2333333 + 1).
Minnesota.
The largest gathering is hajj of Muslims in Saudi Arabia. Every year nearly 3 million people gather at the holy place and perform many rituals.
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The area of Twin Rivers State Forest is 60.225 square kilometers.
Twin Falls Resort State Park was created in 1964.
Neither - they were built the same size !
Minneapolis / St. Paul (The Twin Cities) is in Minnesota.
The Twin Cities, Minneapolis and St. Paul, are named for their close proximity to each other along the Mississippi River. The cities grew side by side and eventually became known as the Twin Cities due to their interconnectedness and shared characteristics.
2012 in Chino, California, had five flying together for a formation picture. It was the largest gathering of P-38's since the 1950's.