Anshu Jamsenpa, from Arunachal Pradesh, climbed Mount Everest by its Southeast Ridge route on May 16. She repeated the feat on May 21, beating a record set by a Nepali woman, Chhurim Sherpa, who made the dual climb in seven days in 2011.
Both ascents are expected to be certified by the Nepali government this week, a tourism department official said.
Ms Jamsenpa also climbed the 8,850 metre (29,035 feet) summit twice in 10 days in 2011. She climbed it again in 2013.
A motivational speaker and trainer in mountaineering, Ms Jamsenpa said she felt an emotional attachment to Everest.
"When I go high up I rediscover myself and can realise the strength of my mind," she told Reuters in Kathmandu over the weekend after returning from the mountain.
Now she has a new goal - to summit Kangto, the highest peak in Arunachal Pradesh, which is 7,042 metres (23,103 feet) tall and has never been climbed, and other unclimbed peaks.
"But before that I want to climb other virgin peaks in the Himalayas," she said.
The mother of two began her expedition in April with a blessing from the Tibetan spiritual leader the Dalai Lama, who gave her a hug.
"That long hug had a magic," she said. "I could not tell him anything. I became speechless."
(Reporting by Gopal Sharma)
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