Datrys (2+1)(2^{2}+1)(2^4+1)(2^8+1)(2^16+1)(2^2+1)+1

$$( 2 + 1 ) ( 2 ^ { 2 } + 1 ) ( 2 ^ { 4 } + 1 ) ( 2 ^ { 8 } + 1 ) ( 2 ^ { 16 } + 1 ) ( 2 ^ { 2 } + 1 ) + 1$$

Enrhifo

$$21474836476$$

Camau Ateb

Lluosi 2^{2}+1 a 2^{2}+1 i gael \left(2^{2}+1\right)^{2}.

$$\left(2+1\right)\left(2^{2}+1\right)^{2}\left(2^{4}+1\right)\left(2^{8}+1\right)\left(2^{16}+1\right)+1$$

Adio 2 a 1 i gael 3.

$$3\left(2^{2}+1\right)^{2}\left(2^{4}+1\right)\left(2^{8}+1\right)\left(2^{16}+1\right)+1$$

Cyfrifo 2 i bŵer 2 a chael 4.

$$3\left(4+1\right)^{2}\left(2^{4}+1\right)\left(2^{8}+1\right)\left(2^{16}+1\right)+1$$

Adio 4 a 1 i gael 5.

$$3\times 5^{2}\left(2^{4}+1\right)\left(2^{8}+1\right)\left(2^{16}+1\right)+1$$

Cyfrifo 5 i bŵer 2 a chael 25.

$$3\times 25\left(2^{4}+1\right)\left(2^{8}+1\right)\left(2^{16}+1\right)+1$$

Lluosi 3 a 25 i gael 75.

$$75\left(2^{4}+1\right)\left(2^{8}+1\right)\left(2^{16}+1\right)+1$$

Cyfrifo 2 i bŵer 4 a chael 16.

$$75\left(16+1\right)\left(2^{8}+1\right)\left(2^{16}+1\right)+1$$

Adio 16 a 1 i gael 17.

$$75\times 17\left(2^{8}+1\right)\left(2^{16}+1\right)+1$$

Lluosi 75 a 17 i gael 1275.

$$1275\left(2^{8}+1\right)\left(2^{16}+1\right)+1$$

Cyfrifo 2 i bŵer 8 a chael 256.

$$1275\left(256+1\right)\left(2^{16}+1\right)+1$$

Adio 256 a 1 i gael 257.

$$1275\times 257\left(2^{16}+1\right)+1$$

Lluosi 1275 a 257 i gael 327675.

$$327675\left(2^{16}+1\right)+1$$

Cyfrifo 2 i bŵer 16 a chael 65536.

$$327675\left(65536+1\right)+1$$

Adio 65536 a 1 i gael 65537.

$$327675\times 65537+1$$

Lluosi 327675 a 65537 i gael 21474836475.

$$21474836475+1$$

Adio 21474836475 a 1 i gael 21474836476.

$$21474836476$$

Ffactor

$$2^{2}\times 479\times 11208161$$