SB 12.9.19

ayutāyuta-varṣāṇāṁ
 sahasrāṇi śatāni ca
vyatīyur bhramatas tasmin
 viṣṇu-māyāvṛtātmanaḥ
Synonyms: 
ayuta — tens of thousands; ayuta — by tens of thousands; varṣāṇām — of years; sahasrāṇi — thousands; śatāni — hundreds; ca — and; vyatīyuḥ — passed by; bhramataḥ — as he wandered; tasmin — in that; viṣṇu-māyā — by the illusory energy of Lord Viṣṇu; āvṛta — covered; ātmanaḥ — his mind.
Translation: 
Countless millions of years passed as Mārkaṇḍeya wandered about in that deluge, his mind bewildered by the illusory energy of Lord Viṣṇu, the Supreme Personality of Godhead.