Datrys (2+1)(2^2+1)(2^4+1)(2^8+1)=

$$( 2 + 1 ) ( 2 ^ { 2 } + 1 ) ( 2 ^ { 4 } + 1 ) ( 2 ^ { 8 } + 1 ) =$$

Enrhifo

$$65535$$

Camau Ateb

Adio 2 a 1 i gael 3.

$$3\left(2^{2}+1\right)\left(2^{4}+1\right)\left(2^{8}+1\right)$$

Cyfrifo 2 i bŵer 2 a chael 4.

$$3\left(4+1\right)\left(2^{4}+1\right)\left(2^{8}+1\right)$$

Adio 4 a 1 i gael 5.

$$3\times 5\left(2^{4}+1\right)\left(2^{8}+1\right)$$

Lluosi 3 a 5 i gael 15.

$$15\left(2^{4}+1\right)\left(2^{8}+1\right)$$

Cyfrifo 2 i bŵer 4 a chael 16.

$$15\left(16+1\right)\left(2^{8}+1\right)$$

Adio 16 a 1 i gael 17.

$$15\times 17\left(2^{8}+1\right)$$

Lluosi 15 a 17 i gael 255.

$$255\left(2^{8}+1\right)$$

Cyfrifo 2 i bŵer 8 a chael 256.

$$255\left(256+1\right)$$

Adio 256 a 1 i gael 257.

$$255\times 257$$

Lluosi 255 a 257 i gael 65535.

$$65535$$

Ffactor

$$3\times 5\times 17\times 257$$