**2 - Wikipedia**
https://en.wikipedia.org/wiki/2

web2 is the first Sophie Germain prime, the first factorial prime, the first Lucas prime, and the first Ramanujan prime. 2 is also a Motzkin number, a Bell number, and the third (or fourth) Fibonacci number. 2 is a meandric number, a semi-meandric number, and an …

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