Shaw, who captains the Mumbai's under-16 squad and the Bandra area Rizvi Springfield School, scored the runs against St. Francis D'Assisi on Wednesday.
Prithvi's 546 runs came off 330 deliveries and was studded with 85 fours and five sixes.
He broke Armaan Jaffer's record of 498 runs.
On Tuesday, Prithvi was unbeaten on 257.
--ANI (Posted on 21-11-2013)