Jukka, OH2BR, made a world record acknowledged by Guinness World Records by making 56,239 QSOs as VP6BR from Pitcairn island during his almost three-month stay on the island in 2005. This is more than any amateur has ever made before from one location with one call-sign in a year. Dick Spenceley, KV4AA, made 48,100 QSOs in 1978.
VP6BR record certificate
The accompanying letter