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The order of secp256k1 is odd (see here), and so there os no points of even order, including 2. The order-1 point is the (additive) identity element (0 : 1 : 0).

I'm not sure what are "first" and "second" elements you refer to.

The order of secp256k1 is odd (see here), and so there os are no points of even order, including order 2. The only order-1 point is the (additive) identity element (0 : 1 : 0).

I'm not sure what are "first" and "second" elements you refer to.