Taken from the NME:
Sir Peter Saville, legendary Joy Division and New Order cover art design man, has teamed up with Paul Smith to design this limited edition t-shirt. Available mid-September, it will commemerate the release of Anton Corbijn's Ian Curtis biopic Control, but it's also a handy physics lesson too. The number references the pulse speed of a neutron star, which is what those funny lines on the cover of 'Unknown Pleasures' represent.
PS When did Saville get a knighthood????!!!