Śrīmad-Bhāgavatam 3.11.24
స్వం స్వం కాలం మనుర్భుఙ్క్తే సాధికాం హ్యేకసప్తతిమ్ ॥ ౨౪ ॥
svaṁ svaṁ kālaṁ manur bhuṅkte
[svam svam kaalam manur bhunkte]
sādhikāṁ hy eka-saptatim
[saadhikaam hy eka-saptatim]
Word-for-word
svam
—
own
svam
—
accordingly
kālam
—
duration of life
manuḥ
—
Manu
bhuṅkte
—
enjoys
sa-adhikām
—
a little more than
hi
—
certainly
eka-saptatim
—
seventy-one.
Blended reading (Sanskrit + English inline)
svaṁ svaṁ kālaṁ manur bhuṅkte
svam
own
svam
accordingly
kālam
duration of life
manuḥ
Manu
bhuṅkte
enjoys
sādhikāṁ hy eka-saptatim
sa-adhikām
a little more than
hi
certainly
eka-saptatim
seventy-one.
Each and every Manu enjoys a life of a little more than seventy-one sets of four millenniums.
Purport
The duration of life of a Manu comprises seventy-one sets of four millenniums, as described in the Viṣṇu Purāṇa. The duration of life of one Manu is about 852,000 years in the calculation of the demigods, or, in the calculation of human beings, 306,720,000 years.
— A.C. Bhaktivedanta Swami Prabhupāda
Gauḍīya Ācāryas
Viśvanātha Cakravartī Ṭhākura
Gauḍīya
Translation
Each Manvantara extends for a little over seventy-one yugas.
A Manu rules for a little more than seventy-one yuga cycles. This is a little over 852,000 devatā years or 306,720,000 human years. This is confirmed in the Viṣṇu Purāṇa.
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Source: vedabase.io