A Nepali mountaineer on Tuesday smashed the speed record for summiting the world`s 14 highest peaks, racing up all `8000ers` in just six months and six days, organisers said.

The previous record for the 14 mountains above 8,000 metres completed by Nirmal Purja at 8.59am on Tuesday was almost eight years.

`It has been a gruelling but humbling six months, and I hope to have proven that anything is possible with some determination, self-belief and positivity,` the 36-year-old said.

`We started with nothing, but look how far we`ve come.` Starting with Italy`s legendary Reinhold Messner in 1986 who on Tuesday praised Purja`s `unique mountaineering accomplishment` around 40 climbers have climbed the Earth`s 14 highest mountains, but none have come close to Purja`s speed.

The late Polish climber Jerzy Kukuczka took seven years, 11 months and 14 days in 1987. South Korean Kim Chang-ho completed the challenge one month faster -although unlil(e Kukuczka and also Purja, he never used supplementary oxygen.

Purja, a former member of the Gurkhas a brigade of Nepalis in British army famous for their fearlessness as well as the elite Special Boat Service, kicked off `Project Possible` in April.

In the first part of his record attempt, Purja ticked off Annapurna, Dhaulagiri, Kanchenjunga, Everest, Lhotse and Makalu in just one month.